hypothalamus (n.) Look up hypothalamus at Dictionary.com
1896, coined 1893 in German from Greek hypo- "under" (see sub-) + thalamus "part of the brain where a nerve emerges."
hypothecate (v.) Look up hypothecate at Dictionary.com
1680s, from hypothecat-, past participle stem of Medieval Latin hypothecare, from Late Latin hypotheca, from Greek hypotheke "a deposit, pledge, mortgage," from hypo- "down" + tithenai "to put, place" (see theme). Related: Hypothecated; hypothecating; hypothecation.
hypothermia (n.) Look up hypothermia at Dictionary.com
1877, Modern Latin, from hypo- "under" (see hypo-) + Greek therme "heat" (see thermal) + abstract noun ending -ia.
hypotheses (n.) Look up hypotheses at Dictionary.com
plural of hypothesis.
hypothesis (n.) Look up hypothesis at Dictionary.com
1590s, from Middle French hypothese and directly from Late Latin hypothesis, from Greek hypothesis "base, basis of an argument, supposition," literally "a placing under," from hypo- "under" (see sub-) + thesis "a placing, proposition" (see thesis). A term in logic; narrower scientific sense is from 1640s.
hypothesise (v.) Look up hypothesise at Dictionary.com
chiefly British English spelling of hypothesize; for suffix, see -ize. Related: Hypothesised; hypothesising.
hypothesize (v.) Look up hypothesize at Dictionary.com
1738, from hypothesis + -ize. Related: Hypothesized; hypothesizing.
hypothetical (adj.) Look up hypothetical at Dictionary.com
1580s, from Greek hypothetikos "pertaining to a hypothesis," from hypothesis (see hypothesis). Related: Hypothetically; hypothetic.
hypotonia (n.) Look up hypotonia at Dictionary.com
1876, medical Latin, from hypo- + Greek tonos "tone" (see tenet) + abstract noun ending -ia.
hypotonic (adj.) Look up hypotonic at Dictionary.com
1873, from hypo- + tonic.
hypoxia (n.) Look up hypoxia at Dictionary.com
1941, from hypo- + oxygen + abstract noun ending -ia. Related: Hypoxic.
hypsi- Look up hypsi- at Dictionary.com
word-forming element meaning "on high," from Greek hypsi "aloft, on high," related to hypsos "height;" cognate with Sanskrit os "above, over," Old Church Slavonic vysoku "high."
Hyrcania Look up Hyrcania at Dictionary.com
ancient region southeast of the Caspian Sea, from Greek Hyrkania, said to be from an Indo-European *verkana "country of wolves" [Zonn, I., et al., "The Caspian Sea Encyclopedia," 2010]
hyssop (n.) Look up hyssop at Dictionary.com
Old English ysope, from Irish Latin hysopus, from Greek hyssopos, a plant of Palestine, used in Jewish purification rites, from Hebrew 'ezobh (compare Syriac zupha, Arabic zufa).
hysterectomy (n.) Look up hysterectomy at Dictionary.com
1886, coined in English from Greek hystera "womb" (see uterus) + -ectomy.
hysteresis (n.) Look up hysteresis at Dictionary.com
1805, from Greek hysteresis "a coming short, a deficiency."
hysteria (n.) Look up hysteria at Dictionary.com
1801, coined in medical Latin as an abstract noun from hysteric (see hysterical) + abstract noun ending -ia.
hysteric (adj.) Look up hysteric at Dictionary.com
1650s, from Latin hystericus, from Greek hysterikos “belonging to the womb” (see hysterical). As a noun from 1751.
hysterical (adj.) Look up hysterical at Dictionary.com
1610s, from Latin hystericus "of the womb," from Greek hysterikos "of the womb, suffering in the womb," from hystera "womb" (see uterus). Originally defined as a neurotic condition peculiar to women and thought to be caused by a dysfunction of the uterus. Meaning "very funny" (by 1939) is from the notion of uncontrollable fits of laughter. Related: Hysterically.
hysterics (n.) Look up hysterics at Dictionary.com
1727, from hysterical. Sometimes in 19c. jocularly folk-etymologized as high-strikes (1838).
hysteron proteron Look up hysteron proteron at Dictionary.com
1560s, from Late Latin, from Greek, literally "the latter (put as) the former." A figure of speech in which what should come last is put first, from hysteron, neuter of hysteros "latter, second, after" (from PIE *ud-tero-, from root *ud- "up, out;" see out) + proteron, neuter of proteros "before, former," from PIE *pro-, from root *per- (1) "forward, through" (see per).