a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations | a natural number that has exactly two distinct natural number divisors: 1 and itself |
the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | the time of maturity when power and vigor are greatest |
an amount of time | the second canonical hour; about 6 a.m. |
the interval taken to complete one cycle of a regularly repeating phenomenon | the period of greatest prosperity or productivity |
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 | |