noun

planetarium

pla-nih-TEH-uh-reerm

Planetarium (noun) means a building or theatre with a domed ceiling used to project images of stars, planets, and other astronomical scenes for viewers below. Example: “The class took a field trip to the planetarium to see a show about black holes.”

noun

A building or theatre with a domed ceiling used to project images of stars, planets, and other astronomical scenes for viewers below.

"The class took a field trip to the planetarium to see a show about black holes."

"The city's planetarium projects a full night sky onto its dome."

How to use planetarium

Learner’s notes

In plain EnglishA dome-shaped theatre that projects the night sky for an audience.

Common pairings

visit the planetarium planetarium show planetarium dome

Word forms

planetariums plural, planetaria plural

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Fill the gap

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The class took a field trip to the _____ to see a show about black holes.

Etymology

Formed from planet plus the Latin ending -arium (a place for something), on the model of words like aquarium.

Origin: Latin

Rhymes for planetarium

opium sodium helium barium radium medium atrium podium Valium Belgium lithium calcium

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Frequently asked questions

What does “planetarium” mean?

The word “planetarium” means a building or theatre with a domed ceiling used to project images of stars, planets, and other astronomical scenes for viewers below. In plain terms, a dome-shaped theatre that projects the night sky for an audience.

How do you pronounce “planetarium”?

“Planetarium” is pronounced pla-nih-TEH-uh-reerm (/plænɪˈtɛəɹɪəm/ in IPA).

How do you use “planetarium” in a sentence?

Here is “planetarium” used in a sentence: “The class took a field trip to the planetarium to see a show about black holes.”

What part of speech is “planetarium”?

“Planetarium” is a noun.

Where does the word “planetarium” come from?

The word “planetarium” comes from Latin. Formed from planet plus the Latin ending -arium (a place for something), on the model of words like aquarium.