planetarium.

A facility that presents an artificial view of the sky, commonly projected onto a dome.

Use it for

Words that belong together

• domed planetarium
• planetarium show

On the page

The planetarium darkened as artificial constellations appeared overhead.

Usage notes

Primary category: sci-fi. Forms: Singular planetarium; plural planetariums or planetaria. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description, technology. Commonness: moderately common.