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ENGLISH · A WORD WITH POSSIBILITIES

planetarium.

A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling.

11 characters4 syllables approx.English language

Meaning & usage

noun/plænɪˈtɛəɹɪəm/Received-Pronunciation/plænɪˈtɛːɹi.əm/Received-Pronunciation/plænɪˈtɛɚiəm//plænəˈtɛɚiəm/
  1. A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling.

  2. An orrery.

Where this word comes from

Borrowed from New Latin planētārium. Equivalent to planet + -arium.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.