English
leucinal
From leucine + -al (“aldehyde”).
A compound of leucine + -al ‘aldehyde’
Proto-Indo-European *lewk- ‘bright’
Proto-Indo-European *lewkós ‘bright’
Proto-Hellenic *leukós ‘white’
Ancient Greek λευκός ‘white’
English leucine
Today it means
noun The aldehyde formed by reduction of the carboxylic acid group of leucine; any of its derivatives.
Language periods are conventional ranges, not dates for this word.
Etymograph / leucinal