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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
ornithine is a noun meaning "an amino acid that does not occur in proteins but is important in the formation of urea". It carries one recorded sense.
an amino acid that does not occur in proteins but is important in the formation of urea
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for ornithine come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.