planetariums

Variant of planetarium

planetarium definition

plan·etar·ium (plan′ə ter′ē əm)

noun pl. planetariums -·iums or planetaria -·ia (-ə)

  1. orrery
    1. 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
    2. the room or building in which this is contained

Etymology: ModL < LL planeta, planet + L (sol)arium, solarium

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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