English

hemisystole

From hemi- + systole.

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

Proto-Indo-European *sēmi ‘half’

English hemi-

Ancient Greek συστέλλω ‘to contract’

Ancient Greek συστολή ‘contraction, drawing together’

Today it means

noun The contraction of the left ventricle alternating with that of the right ventricle, instead of both contracting together

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

Etymograph / hemisystole