plural of periodic inequality

plural of periodic month

Synonym of tropical month

plural of probationary period

The state of a woman too poor to be able to afford sanitary products (tampons, sanitary towels and the like) connected to her period.

The period following postclassical history (in Europe known as the "Middle Ages"), spanning from about 1500 to the present.

(idiomatic, slang, euphemistic) Menstruating.

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

(historical) The Uruk period.

plural of time period