a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations | the time period during which only modern Homo sapiens was known to have existed; ended about 10,000 years BC |
the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | |
an amount of time | |
the interval taken to complete one cycle of a regularly repeating phenomenon | |
a unit of geological time during which a system of rocks formed | |
the end or completion of something | |
(ice hockey) one of three divisions into which play is divided in hockey games | |