| a suffix occurring in loanwords from Latin, which often denote a location or receptacle (armarium; caldarium; solarium; vivarium). It has limited productivity in English, esp. in words denoting an artificial environment for plants or animals, on the model of vivarium or herbarium: aquarium; insectarium; terrarium. |
| -arium suff. A place or device containing or associated with: planetarium. [Latin, neuter of -ārius, -ary.] |
