Etymology
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tryptophan (n.)

also tryptophane, complex amino acid, 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").

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Definitions of tryptophan

tryptophan (n.)
an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin;
Synonyms: tryptophane
From wordnet.princeton.edu

Dictionary entries near tryptophan

-try

trying

tryout

trypsin

tryptic

tryptophan

tryst

tsar

tsetse

T-shirt

tsk