Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Noun: planetarium (planetariums,planetaria)  ,pla-ni'teh-ree-um
  1. A building housing an instrument for projecting the positions of the planets onto a domed ceiling
     
  2. An optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome
     
  3. An apparatus or model for representing the solar systems

Derived forms: planetariums, planetaria

Type of: building, edifice, model, optical device, simulation

Encyclopedia: Planetarium

Nearest

planeload
planeness
plane-polarised
plane-polarized
planer
Planera
planet
planet gear
planet wheel
planetal
planetarium
planetary
planetary gear
planetary house
planetary mixer
planetary nebula
planetary science
planetesimal
planetesimal hypothesis
planetoid
planetology