English

haplolethal

From haplo- + lethal.

Proto-Indo-European *sem- ‘one, whole’

Ancient Greek ἁπλόος ‘single, simple’

Latin lētum ‘death’

Latin lētālis ‘deadly, mortal, fatal’

Today it means

adj lethal if haploid

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

Etymograph / haplolethal