English

leukotoxin

From leuko- + toxin.

Proto-Indo-European *lewk- ‘white’

Proto-Hellenic *leukós ‘white’

Ancient Greek λευκός ‘white’

Latin toxicum ‘a poison used on the tips of arrows’

English toxin

Today it means

noun Any substance that is toxic to leukocytes

Language periods are conventional ranges, not dates for this word.

Etymograph / leukotoxin