plural of Sothic period

An event of a woman's discharging of menstrual flow of blood and cells.

(epidemiology) The time elapsed between an exposure to a pathogenic organism, a chemical or radiation, and the appearance of signs and symptoms.

(grammar) A sentence whose main clause appears at the end, after other, especially dependent, clauses. / (physics) A structure made of bays coupled through one or more coordinates.

(Britain, informal, plural only) Underwear worn by a woman or girl during menstruation, typically old, cheap, or of a dark colour in case of staining.

plural of periodic structure

(music) the musical period of time following the Baroque period and preceding the Romantic period, spanning c.1750-c.1820.

plural of periodic function

Sexual intercourse during menstruation.

plural of sunrise period