period

period

名词 period:

an amount of time

同义词：time period, period of time

one of three periods of play in hockey games

a stage in the history of a culture having a definable place in space and time

同义词：historic period, historical period

the interval taken to complete one cycle of a regularly repeating phenomenon

the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause--Aristotle

同义词：menstruation, menses, menstruum, catamenia, flow

a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations

同义词：point, full stop, stop, full point

a unit of geological time during which a system of rocks formed

同义词：geological period

the end or completion of something