We don't have synonyms for leucin yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are leucon, leucic and leukin.
(n) :
Dated form of leucine. [(biochemistry) An essential amino acid, C₆H₁₃NO₂, isomeric with isoleucine, found in most animal proteins; it is essential for growth in children.]
(n) :
Dated form of leucine. [(biochemistry) An essential amino acid, C₆H₁₃NO₂, isomeric with isoleucine, found in most animal proteins; it is essential for growth in children.]