a framework of wood or metal that contains a glass windowpane and is built into a wall or roof to admit light or air | a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations |
a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened | the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause |
a transparent panel (as of an envelope) inserted in an otherwise opaque material | an amount of time |
(computer science) a rectangular part of a computer screen that contains a display different from the rest of the screen | the interval taken to complete one cycle of a regularly repeating phenomenon |
a pane of glass in a window | a unit of geological time during which a system of rocks formed |
an opening in a wall or screen that admits light and air and through which customers can be served | the end or completion of something |
an opening that resembles a window in appearance or function | (ice hockey) one of three divisions into which play is divided in hockey games |
the time period that is considered best for starting or finishing something | |