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Origin and history of tryptophan

tryptophan(n.)

also tryptophane, complex amino acid essential in animal diet, 1890, coined in German (1876) from trypto-, taken as a combining form of tryptic "by trypsin" (see trypsin) + Greek phainein "bring to light, cause to appear, show" (from PIE root *bha- (1) "to shine").

also from 1890

Entries linking to tryptophan

trypsin(n.)

chief digestive enzyme of pancreatic juice, 1876, coined 1874 by German physiologist Wilhelm Friedrich Kühne (1837-1900), apparently from Greek tripsis "rubbing, friction" (from tribein "to rub, rub down, wear away;" from PIE root *tere- (1) "to rub, turn") + chemical suffix -in (2). Said to be so called because it first was obtained (in 1862) by rubbing the pancreas with glycerin.

tryptic(adj.)

"pertaining to or of the nature of trypsin," 1877, from trypsin + -ic (compare pepsin/peptic).

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oblivion
late 14c., oblivioun, "state or fact of forgetting, forgetfulness, loss of memory," from Old French oblivion (13c.) and directly from Latin oblivionem (nominative oblivio) "forgetfulness; a being forgotten," from oblivisci (past participle oblitus) "forget," which is of uncertain
supplication
late 14c., supplicacioun, "earnest request, entreaty, plea," from Old French suplicacion "humble request" and directly from Latin supplicationem (nominative supplicatio) "a public prayer, thanksgiving day," noun of action from past-participle stem of supplicare "to beg humbly" (i
cherub
late 14c. as an order of angels, from Late Latin cherub, from Greek kheroub, from Hebrew kerubh (plural kerubhim) "winged angel," which according to Klein is perhaps related to Akkadian karubu "to bless," karibu "one who blesses," an epithet of the bull-colossus. Old English had
empty
c. 1200, from Old English æmettig, of persons, "at leisure, not occupied; unmarried" (senses now obsolete), also, of receptacles, "containing nothing," of places, "unoccupied," from æmetta "leisure." Watkins explains it as from Proto-Germanic *e-mot-ja-, with a prefix of uncertai
art
early 13c., "skill as a result of learning or practice," from Old French art (10c.), from Latin artem (nominative ars) "work of art; practical skill; a business, craft," from PIE *ar(ə)-ti- (source also of Sanskrit rtih "manner, mode;" Greek artizein "to prepare"), suffixed form
blood
Old English blod "blood, fluid which circulates in the arteries and veins," from Proto-Germanic *blodam "blood" (source also of Old Frisian blod, Old Saxon blôd, Old Norse bloð, Middle Dutch bloet, Dutch bloed, Old High German bluot, German Blut, Gothic bloþ), according to some s
satire
c. 1500, "a literary work (originally in verse) intended to ridicule prevailing vice or folly by scornful or contemptuous expression," from French satire (14c.) and directly from Latin satira "satire; poetic medley," earlier satura, in lanx satura "mixed dish, dish filled with va
trust
c. 1200, "reliance on the veracity, integrity, or other virtues of someone or something; religious faith," from Old Norse traust "help, confidence, protection, support," from Proto-Germanic abstract noun *traustam (source also of Old Frisian trast, Dutch troost "comfort, consolat
toilet
1530s, earliest in English in an obsolete sense "cover or bag for clothes," from French toilette "a cloth; a bag for clothes," diminutive of toile "cloth, net" (see toil (n.2)). Toilet acquired an association with upper class dressing by 18c., through the specific sense "a fine c
zombie
also zombi, jumbie, 1788, possibly representing two separate words, one relating to the dead and the other to authority figures, but if so historically these were not kept distinct in English-speaking usage. The oldest attested sense in English is "'spirits of dead wicked men [..

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