a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations | (astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun) |
the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | (physical chemistry) a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary |
an amount of time | any distinct time period in a sequence of events |
the interval taken to complete one cycle of a regularly repeating phenomenon | a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle |
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 | |