Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Noun
S: (n) planetarium (a building housing an instrument for projecting the positions of the planets onto a domed ceiling)
S: (n) planetarium (an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome)
S: (n) planetarium (an apparatus or model for representing the solar systems)