ornithine

== English == === Etymology === Blend of ornith- +‎ (ur)ine. === Noun === ornithine (countable and uncountable, plural ornithines) (biochemistry, organic chemistry) An amino acid, 2,5-diaminopentanoic acid, that is not present in protein, but is an intermediate in the biosynthesis of urea. ==== Derived terms ==== ==== Translations ====