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lysine.

An amino acid, C₆H₁₄N₂O₂, in L- or D-forms.

6 characters2 syllables approx.English language

Meaning & usage

noun/ˈlaɪsiːn/
  1. An amino acid, C₆H₁₄N₂O₂, in L- or D-forms.

    countable · uncountable
  2. An amino acid, C₆H₁₄N₂O₂, in L- or D-forms. The L-form of such a molecule, as it occurs in living organisms; in humans it is an essential amino acid.

    countable · uncountable
Where this word comes from

Etymology tree Proto-Indo-European *lewh₁-der. Ancient Greek λύω (lúō) Proto-Indo-European *-tis Proto-Hellenic *-tis Ancient Greek -τῐς (-tĭs) Ancient Greek -σις (-sis) Ancient Greek λῠ́σῐς (lŭ́sĭs)der. Latin lysisbor. English lysis Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ine English lysine From lysis + -ine, in reference to its tendency to participate in catalysis.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.