English

subperiod

From sub- + period.

Formed from sub- + period

Proto-Indo-European *upó ‘up; from below’

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Ancient Greek περῐ́οδος ‘circuit, orbit, recurring interval of time’

Medieval Latin periodus

Middle French periode

Middle English periode

Today it means

noun A period making up part of a larger period.

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

Etymograph / subperiod