1. Planetarium consisting of an apparatus that illustrates the relative positions and motions of bodies in the solar system by rotation and revolution of balls moved by wheelwork; sometimes incorporated in a clock

Derived forms: orreries

Type of: planetarium

Encyclopedia: Orrery

• mastoidale
• mastoidectomy
• mastoiditis
• mastopathy
• mastopexy
• Mastotermes
• Mastotermes darwiniensis
• Mastotermes electrodominicus
• Mastotermes electromexicus
• Mastotermitidae
• masturbate
• masturbation
• masturbator
• mat
• mat up
• Mata Hari
• Matabele
• matador
• matai
• Matakam
• Matamoros
• match
• match game
• match plane
• match play