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tryptophan

[trip-tuh-fan]
noun Biochemistry.
  1. an essential amino acid, (C8H6N)CH2CH(NH2)COOH, colorless, crystalline, and aromatic, released from proteins by tryptic digestion and a precursor of serotonin. Abbreviation: Trp; Symbol: W
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Also tryp·to·phane [trip-tuh-feyn] /ˈtrɪp təˌfeɪn/.

Origin of tryptophan

1900–05; trypto- (irregular combining form representing Greek trīptós rubbed) + -phan(e)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for tryptophan

tryptophan

noun
  1. an essential amino acid; a component of proteins necessary for growth
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Word Origin

C20: from trypt (ic) + -o + -phan variant of -phane
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for tryptophan

n.

also tryptophane, complex amino acid, 1890, coined in German from trypto-, taken as a comb. form of tryptic "by trypsin," + Greek phainein "to appear" (see phantasm).

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Online Etymology Dictionary, © 2010 Douglas Harper

tryptophan in Medicine

tryptophan

(trĭptə-făn′)
n.
  1. An essential amino acid formed from proteins during the digestive process by the action of proteolytic enzymes.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

tryptophan in Science

tryptophan

[trĭptə-făn′]
  1. An essential amino acid. Chemical formula: C11H12N2O2. See more at amino acid.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.