DictionaryRoot: -arium
Latin
-arium
a place or thing associated with something
Forms
- -arium
- -ary — One later development through French and English.
Origin
The Latin noun form corresponding to the descriptive ending -arius.
Note
A place for keeping something is a common use, but the ending can also name an associated object.
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noun
planetarium
plan-ih-TAIR-ee-uhm/ˌplænɪˈteriəm/
A theater with a dome displaying a simulated night sky.
Etymology
Despite its “place for planets” formation, the word first named a machine representing planetary motions. It later named a sky-projection device, connecting the modern room with an artificial display of the heavens.