tryptophan

noun
tryp·​to·​phan | \ ˈtrip-tə-ˌfan How to pronounce tryptophan (audio) \
variants: or less commonly tryptophane \ ˈtrip-​tə-​ˌfān How to pronounce tryptophan (audio) \

Definition of tryptophan

: a crystalline essential amino acid C11H12N2O2 that is widely distributed in proteins

Examples of tryptophan in a Sentence

Recent Examples on the Web Since it's not promoted, there's more tryptophan available to influence someone's tiredness. Jordan Mendoza, USA TODAY, 26 Nov. 2021 The 152 tryptophan is substituted for leucine in the California variants. William A. Haseltine, Forbes, 20 Sep. 2021 Without the ability to measure fecal coliform in real time, the Chicago River probes measure tryptophan-like fluorescence; researchers say readings spike after rain events or sewage dumps, similarly to fecal coliform levels. Morgan Greene, chicagotribune.com, 2 Sep. 2021 Carbohydrates in berries can help to amplify serotonin production in the brain, while yogurt is a source of sleep-promoting tryptophan. Lisa Drayer, CNN, 20 Apr. 2021 Carbohydrates in berries can help to amplify serotonin production in the brain, while yogurt is a source of sleep-promoting tryptophan. Lisa Drayer, CNN, 20 Apr. 2021 Carbohydrates in berries can help to amplify serotonin production in the brain, while yogurt is a source of sleep-promoting tryptophan. Lisa Drayer, CNN, 20 Apr. 2021 Carbohydrates in berries can help to amplify serotonin production in the brain, while yogurt is a source of sleep-promoting tryptophan. Lisa Drayer, CNN, 20 Apr. 2021 Carbohydrates in berries can help to amplify serotonin production in the brain, while yogurt is a source of sleep-promoting tryptophan. Lisa Drayer, CNN, 20 Apr. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tryptophan.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of tryptophan

1890, in the meaning defined above

History and Etymology for tryptophan

borrowed from German Tryptophan, from tryptisch tryptic + -o- -o- + -phan -phane

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Time Traveler for tryptophan

Time Traveler

The first known use of tryptophan was in 1890

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Dictionary Entries Near tryptophan

tryptone

tryptophan

trysail

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Cite this Entry

“Tryptophan.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tryptophan. Accessed 28 May. 2022.

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More Definitions for tryptophan

tryptophan

noun
tryp·​to·​phan | \ ˈtrip-tə-ˌfan How to pronounce tryptophan (audio) \
variants: also tryptophane \ -​ˌfān How to pronounce tryptophan (audio) \

Medical Definition of tryptophan

: a crystalline essential amino acid C11H12N2O2 that is widely distributed in proteins abbreviation Trp

More from Merriam-Webster on tryptophan

Britannica.com: Encyclopedia article about tryptophan

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