期

initial stages; first stage; early period; pioneer days; beginning; outset

post-impressionism; postimpressionism

downtime; suspension period

initial defect

before scheduled; earlier than expected

regularly scheduled game; regularly scheduled match

the last stage

incubation period

airborne early-warning system; AWACS

period of employment

periodic table

prosperous period

definite (period or term)

interphase; interkinesis; midcycle

short-term stay

lifetime

long-term (business) strategy

Physics; Chemistry

half life

coldest period

early treatment

off period; off season; slack season

Geology

glacial period; glacial; glaciation

autumn period; autumn term (e.g. school); fall period; fall term

Biology

leptotene