any of several energy states an atom may occupy without emitting electromagnetic radiation.
noun 1. standing wave. stationary wave noun 1. another name for standing wave stationary wave See standing wave.
noun, Radio and Television. 1. an interval between or during programs for identifying the station, making announcements, etc.
noun 1. a place or position in which a person or thing is normally located. 2. a stopping place for trains or other land conveyances, for the transfer of freight or passengers. 3. the building or buildings at such a stopping place. 4. the district or municipal headquarters of certain public services: police station; fire […]
noun 1. a person who sells the materials used in writing, as paper, pens, pencils, and ink. 2. Archaic. a bookseller. a publisher. noun 1. a person who sells stationery or a shop where stationery is sold 2. (obsolete) a publisher or bookseller