tech (n.) Look up tech at Dictionary.com
1906 as short for technical college (or institute, etc.), American English; 1942 as short for technician.
techie (n.) Look up techie at Dictionary.com
one well-versed in the latest technology, by 1984.
technetium (n.) Look up technetium at Dictionary.com
1947, coined in Modern Latin from Greek tekhnetos "artificial," from tekhne "art, skill, craft" (see techno-) + metallic element ending -ium.
technic (adj.) Look up technic at Dictionary.com
1610s, "technical," from Latin technicus, from Greek tekhnikos "of or pertaining to art, made by art," from tekhne "art, skill, craft" (see techno-). As a noun, "performance method of an art," 1855, a nativization of technique.
technical (adj.) Look up technical at Dictionary.com
1610s, "skilled in a particular art or subject," formed in English from technic + -al (1), or in part from Greek tekhnikos "of art; systematic," in reference to persons "skillful, artistic," from tekhne "art, skill, craft" (see techno-).

The sense narrowed to "having to do with the mechanical arts" (1727). Basketball technical foul (one which does not involve contact between opponents) is recorded from 1934. Boxing technical knock-out (one in which the loser is not knocked out) is recorded from 1921; abbreviation TKO is from 1940s. Technical difficulty is from 1805.
technicality (n.) Look up technicality at Dictionary.com
1814, "that which is peculiar to any science, art, etc.," from technical + -ity. Meaning "technical character or quality" is from 1828. Related: Technicalities.
technician (n.) Look up technician at Dictionary.com
1833, "person expert in the technicalities of some question," from technic + -ian. Meaning "person skilled in mechanical arts" is recorded from 1939.
technicolor (n.) Look up technicolor at Dictionary.com
"vivid color," 1946, earlier as a trademark name (Technicolor, registered in U.S. 1917) for a process of making color movies, from technical + color (n.). As an adjective from 1940.
technics (n.) Look up technics at Dictionary.com
1850, from technic; also see -ics. Technicist is attested from 1876.
technique (n.) Look up technique at Dictionary.com
1817, at first especially in criticism of art and music, from French technique "formal practical details in artistic expression" (18c.), noun use of technique (adj.) "of art, technical," from Greek tekhnikos "pertaining to art," from tekhne "art, skill, craft in work" (see techno-).
techno- Look up techno- at Dictionary.com
word-forming element meaning "art, craft, skill," later "technical, technology," from Latinized form of Greek tekhno-, combining form of tekhne "art, skill, craft in work; method, system, an art, a system or method of making or doing," from PIE *teks-na- "craft" (of weaving or fabricating), from suffixed form of root *teks- "to weave, fabricate, make" (cognates: Sanskrit taksan "carpenter," Greek tekton "carpenter," Latin texere "to weave;" see texture (n.)).
technocracy (n.) Look up technocracy at Dictionary.com
1919, coined by W.H. Smyth as a name for a new system of government by technical experts, from techno- + -cracy.
William Henry Smyth, a distinguished engineer of Berkeley, California, wrote at the close of the war a series of thoughtful papers for the New York magazine "Industrial Management", on the subject of "Technocracy". His thesis was the need of a Supreme National Council of Scientists to advise us how best to live, and how most efficiently to realize our individual aspirations and our national purpose. ["The Bookman," March 1922]
technocrat (n.) Look up technocrat at Dictionary.com
1932, back-formation from technocracy. Related: Technocratic.
technological (adj.) Look up technological at Dictionary.com
1620s, in reference to terminology, from technology + -ical. Meaning "of or relating to technology" from 1800. Related: Technologically.
technologist (n.) Look up technologist at Dictionary.com
"one versed in technology," 1803, from technology + -ist.
technology (n.) Look up technology at Dictionary.com
1610s, "a discourse or treatise on an art or the arts," from Greek tekhnologia "systematic treatment of an art, craft, or technique," originally referring to grammar, from tekhno- (see techno-) + -logy. The meaning "study of mechanical and industrial arts" (Century Dictionary, 1902, gives examples of "spinning, metal-working, or brewing") is first recorded 1859. High technology attested from 1964; short form high-tech is from 1972.
technophile (n.) Look up technophile at Dictionary.com
1968, from techno- + -phile.
technophobe (n.) Look up technophobe at Dictionary.com
by 1952, perhaps by 1946, from techno- + -phobe.
If the reader will consult such a book as Recent Economic Changes, by David A. Wells, published in 1889, he will find passages that, except for the dates and absolute amounts involved, might have been written by our technophobes (if I may coin a needed word) of today. [Henry Hazlitt, "Economics in One Lesson," 1952 edition]
tectonic (adj.) Look up tectonic at Dictionary.com
1650s, "of or relating to building or construction," from Late Latin tectonicus, from Greek tektonikos "pertaining to building," from tekton (genitive tektonos) "builder, carpenter, woodworker; master in any art (sculpture, metal-work, writing)," from PIE root *teks- "to make" (see texture (n.)). The geological sense, "pertaining to the structure of the Earth's crust," is recorded from 1887.
tectonics (n.) Look up tectonics at Dictionary.com
1899 in the geological sense, from tectonic (also see -ics); earlier it meant "building or constructive arts in general" (1850).
Tecumseh Look up Tecumseh at Dictionary.com
Native American leader (1768-1813), his name is Shawnee (Algonquian), perhaps literally "flies across;" compare Menominee /takhamehse:w/ "flies straight across."
ted (v.) Look up ted at Dictionary.com
"to spread" (new-mown grass for drying), c.1300, from an unrecorded Old English *teddan or from a Scandinavian source akin to Old Norse teðja "to spread manure." Related to German verzetteln "to scatter, squander." Related: Tedding; tedder.
Teddy Look up Teddy at Dictionary.com
pet form of masc. proper names Edward, Edmund, and Theodore, with -y (3). Meaning "women's undergarment" (with lower-case t-) is recorded from 1924, of unknown origin, perhaps from some fancied resemblance to a teddy bear (q.v.), a theory that dates to 1929. In British slang phrase teddy boy (1954) it is short for Edward, from the preference of such youths for Edwardian styles (1901-10). Teddies (probably from Teddy Roosevelt) was one of the names given to U.S. troops in France in 1917.
teddy bear (n.) Look up teddy bear at Dictionary.com
1906, named for U.S. president Theodore "Teddy" Roosevelt (1858-1919), a noted big-game hunter, whose conservationist fervor inspired a comic illustrated poem in the "New York Times" of Jan. 7, 1906, about two bears named Teddy, whose names were transferred to two bears presented to the Bronx Zoo that year. The name was picked up by toy dealers in 1907 for a line of "Roosevelt bears" imported from Germany. Meaning "big, lovable person" first attested 1957, from the song popularized by Elvis Presley.
tedesco (n.) Look up tedesco at Dictionary.com
"Teutonic influence in the arts," 1874 in this form, from Italian, literally "German," from Medieval Latin theodiscus (see Dutch). Compare Old French tiois "a German," tiesche (adj.) "German."
tedious (adj.) Look up tedious at Dictionary.com
early 15c., from Old French tedieus, from Late Latin taediosus "wearisome, irksome, tedious," from Latin taedium (see tedium). Related: Tediously; tediousness.
tedium (n.) Look up tedium at Dictionary.com
"tediousness," 1660s, from Latin taedium "weariness, irksomeness, disgust," related to taedet "it is wearisome, it excites loathing," and to taedere "to weary," of uncertain origin. Possible cognates are Old Church Slavonic težo, Lithuanian tingiu "to be dull, be listless."
tee (n.) Look up tee at Dictionary.com
in golf, 1721, back-formation from teaz (1673), taken as a plural; a Scottish word of uncertain origin. The original form was a little heap of sand. The verb meaning "place a ball on a golf tee" is recorded from 1670s; figurative sense of "to make ready" (usually with up) is recorded from 1938. Teed off in the figurative sense of "angry, annoyed" is first recorded 1953, probably as a euphemism for p(iss)ed off.
tee-hee Look up tee-hee at Dictionary.com
imitative of derisive tittering laughter at least since Chaucer ("The Miller's Tale").
teem (v.1) Look up teem at Dictionary.com
"abound, swarm, be prolific," Old English teman (Mercian), tieman (West Saxon) "beget, give birth to, bring forth, produce, propagate," from Proto-Germanic *tau(h)mjan (denominative), from PIE *deuk- "to lead" (see duke (n.)). Related to team (n.) in its now-obsolete Old English sense of "family, brood of young animals." The meaning "abound, swarm" is first recorded 1590s, on the notion of "be full of as if ready to give birth." Related: Teemed; teeming.
teem (v.2) Look up teem at Dictionary.com
"to flow copiously," early 14c., "to empty out" (transitive), from a Scandinavian source akin to Old Norse toema "to empty," from tomr "empty," cognate with Old English tom (adj.) "empty, free from." The original notion is of "to empty a vessel," thus "to pour out." Intransitive sense of "to pour, flow, stream" is from 1828. Related: Teemed; teeming.
teeming (adj.) Look up teeming at Dictionary.com
"swarming," 1715, earlier "abundantly productive, fertile" (1590s), present participle adjective from teem (v.1).
teen (n.) Look up teen at Dictionary.com
"teen-aged person," 1818 (but rare before 20c.), from -teen. As an adjective meaning "of or for teen-agers," from 1947.
teenage (adj.) Look up teenage at Dictionary.com
also teen age, teen-age; 1911, from teen + age (n.). Originally in reference to Sunday School classes. Teen-aged (adj.) is from 1922.
teenager (n.) Look up teenager at Dictionary.com
also teen ager, teen-ager; 1922, derived noun from teenage (q.v.). The earlier word for this was teener, attested in American English from 1894, and teen had been used as a noun to mean "teen-aged person" in 1818, though this was not common before 20c.
teens (n.) Look up teens at Dictionary.com
1670s (plural), "teen-age years of a person," formed from -teen taken as a separate word. As "decade of years comprising numbers ending in -teen," from 1889.
teeny (adj.) Look up teeny at Dictionary.com
1825, alteration of tiny; teeny-tiny attested from 1867. Alternative form teensy is attested from 1899 (teensy-weensy is from 1906). Also teenty (1844).
teeny-bopper (n.) Look up teeny-bopper at Dictionary.com
1966, from teen (n.) but also felt as influenced by teeny. For second element, see bop.
teeter (v.) Look up teeter at Dictionary.com
1843, "to seesaw," alteration of Middle English titter "move unsteadily," probably from a Scandinavian source akin to Old Norse titra "to shake, shiver, totter, tremble," from Proto-Germanic *ti-tra- (cognates: German zittern "to tremble"). Meaning "move unsteadily, be on the edge of imbalance" is from 1844. Noun teeter-totter "see-saw" is attested from 1905 (earlier simply teeter, 1855, and titter-totter in same sense is from 1520s). Totter (n.) "board swing" is recorded from late 14c.; see totter (v.).
teeth (n.) Look up teeth at Dictionary.com
plural of tooth (n.). In reference to laws, contracts, etc., "power of enforcement," from 1925. To be armed to the teeth is from late 14c.
teethe (v.) Look up teethe at Dictionary.com
early 15c., probably from an unrecorded Old English verb *teþan, from toþ (see tooth). Related: Teethed; teething.
teething (n.) Look up teething at Dictionary.com
1724, verbal noun from teethe (v.). Teething-ring attested from 1853.
teetotal (v.) Look up teetotal at Dictionary.com
"pledged to total abstinence from intoxicating drink," 1834, possibly formed from total (adj.) with a reduplication of the initial T- for emphasis (T-totally "totally," though not in an abstinence sense, is recorded in Kentucky dialect from 1832 and is possibly older in Irish-English).

The use in temperance jargon was first noted September 1833 in a speech advocating total abstinence (from beer as well as wine and liquor) by Richard "Dicky" Turner, a working-man from Preston, England. Also said to have been introduced in 1827 in a New York temperance society which recorded a T after the signature of those who had pledged total abstinence, but contemporary evidence for this is wanting, and while Century Dictionary allows that "the word may have originated independently in the two countries," OED favors the British origin and ones that Webster (1847) calls teetotaler "a cant word formed in England."
teetotaler (n.) Look up teetotaler at Dictionary.com
also teetotaller, 1834, agent noun from teetotal. Related: Teetotalism.
tefillin (n.) Look up tefillin at Dictionary.com
1610s, from Rabbinical Hebrew t'phillim, plural of t'phillah "prayer."
Teflon (n.) Look up Teflon at Dictionary.com
commercially important synthetic polymer, 1945, proprietary name registered in U.S. by du Pont, from chemical name (poly)te(tra)fl(uoroethylene) + arbitrary ending -on; popularized as a coating of non-stick pans in 1960s; metaphoric extension, especially in reference to U.S. President Ronald Reagan, is attested from an Aug. 2, 1983, speech on the floor of Congress by Pat Schroeder.
teg (n.) Look up teg at Dictionary.com
sheep in its second year, 1520s, of uncertain origin, perhaps from a Scandinavian source (compare Swedish tacka "ewe").
tegular (adj.) Look up tegular at Dictionary.com
"of or like a tile," 1796, from Latin tegula "tile" (see tile (n.)) + -ar. Related: Tegulated.
tegument (n.) Look up tegument at Dictionary.com
"a covering, a natural protection of the body or some part of it," mid-15c., from Latin tegumentum "a covering, a cover," from tegere "to cover," from PIE root *(s)teg- (2) "to cover" (see stegosaurus). Related: Tegumentary.
Tehran Look up Tehran at Dictionary.com
also Teheran, Iranian capital, said to mean "flat, level, lower," but sometimes derived from Old Persian teh "warm" + ran "place."