plural of periodic acid

(accounting) A system of assessing a business' inventory in which updates are made on a periodic basis, so that a completely accurate account is only available immediately after the update.

Alternative form of periodic comet

Alternative form of menstrual period

Alternative form of Question Period

Alternative spelling of quasiperiodic

(idiomatic, slang, euphemistic) Menstruating.

(historical) The Uruk period.

(historical) A period between circa 4000 to 3100 BC which saw the emergence of urban life in Mesopotamia and the Sumerian civilization.

(UK, television) A period of time on a Saturday during which football matches may not be broadcast (so as to avoid reduced attendance in person at other football matches that are not being televised).