-ˌlēn, -_lə̇n noun
( -s )
Etymology: International Scientific Vocabulary citrull- (from New Latin Citrullus, genus name of Citrullus vulgaris ) + -ine
: a crystalline amino acid H 2 NCONH(CH 2 ) 3 CH(NH 2 )COOH formed as an intermediate in the conversion of ornithine to arginine in the living organism; α-amino-δ-ureido-valeric acid