periods

1. an amount of timeExamples: "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"Synonyms: period, period of time, time period

2. the interval taken to complete one cycle of a regularly repeating phenomenonSynonyms: period

3. (ice hockey) one of three divisions into which play is divided in hockey gamesSynonyms: period

4. a unit of geological time during which a system of rocks formedExamples: "ganoid fishes swarmed during the earlier geological periods"Synonyms: geological period, period

5. the end or completion of somethingExamples: "death put a period to his endeavors"; "a change soon put a period to my tranquility"Synonyms: period

6. the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause; ; --Hippocrates; --AristotleExamples: "the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped"; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females"Synonyms: catamenia, flow, menses, menstruation, menstruum, period