Dictionary Home »
Dictionary Definitions » planetarium
planetarium
noun pl. planetariums or planetaria
- orrery
- the complex revolving projector used to simulate the past, present, or future motions or positions of the sun, moon, planets, and stars on the inside of a large dome
- the room or building in which this is contained
See planetarium in American Heritage Dictionary 4
Learn more about planetarium
link/cite print suggestion box