Etymology
Advertisement
psychedelic (adj.)

occasionally psychodelic, "producing expanded consciousness through heightened awareness and feeling," 1956, of drugs, suggested by British-born Canadian psychiatrist Humphry Osmond in a letter to Aldous Huxley and used by Osmond in a scientific paper published the next year; from Greek psykhē "mind" (see psyche) + dēloun "make visible, reveal" (from dēlos "visible, clear," from PIE root *dyeu- "to shine").

In popular use from 1965 with reference to anything producing effects or sensations similar to the common perception of the effects of a psychedelic drug. As a noun, "a psychedelic drug," from 1956.

Related entries & more 
Advertisement
phanopoeia (n.)

1929, Pound's term for "a casting of images upon the visual imagination" in literature, from Greek phanai "to show, make visible, bring to light" (from PIE root *bha- (1) "to shine") + poiein "to make, create" (see poet).

Related entries & more 
pruritus (n.)

"affection of the skin characterized by simple itching without visible eruption," 1650s, from Latin pruritus, past participle of prurire "to itch" (see prurient). The word was earlier in English via Old French in form prurite (early 15c.). Related: Pruritic.

Related entries & more 
apert (adj.)
"open, evident, undisguised," early 14c., from Old French apert "obvious, evident, visible, plain to see," and directly from Latin apertus "open, uncovered, unclosed," past participle of aperire "to open, uncover" (see overt). Related: Apertly.
Related entries & more 
discernible (adj.)

also discernable, "perceptible, visible, observable," 1560s, from French discernable, from discerner "distinguish (between), separate" (see discern). Form with -a- was more common at first; spelling changed to -i- 17c. to conform to Late Latin discernibilis. Related: Discernibly.

Related entries & more 
Advertisement
catoptric (adj.)
"pertaining to mirrors or a mirror," 1774, from Latinized form of Greek katoptrikos, from katoptron "mirror," from kata "against" (see cata-) + stem of optos "seen, visible" (from PIE root *okw- "to see") + instrumental suffix -tron. Related: Catoptrics; catoptrical.
Related entries & more 
boundary (n.)
"that which indicates the limits of anything," 1620s, from bound (n.1) + -ary. Strictly, a visible mark indicating a dividing line, a bound being the limit or furthest point of extension of any one thing.
Related entries & more 
tarbrush (n.)
1711, from tar (n.1) + brush (n.1). To have a touch of the tarbrush "have a dash of African ancestry visible in the skin tone" (1796) was "a term of contempt from the West Indies" [Century Dictionary].
Related entries & more 
tarn (n.)
late 14c., mid-13c. in Anglo-Latin, from Old Norse tjörn "small mountain lake without visible tributaries," from Proto-Germanic *terno, perhaps originally "water hole" [Barnhart]. A dialectal word popularized by the Lake poets.
Related entries & more 
betoken (v.)

late Old English betacnian "to denote, to mean, signify; be a visible sign or emblem of," from be- + Old English tacnian "to signify," from tacn "sign" (see token) or from Proto-Germanic *taiknōjanan. From c. 1200 as "to augur, presage, portend," also "be or give evidence of." Related: Betokened; betokening.

Related entries & more 

Page 3