Definition of -orium in English:

-orium

Pronunciation: /ˈɔːrɪəm/

suffix

Forming nouns denoting a place for a particular function: auditorium sanatorium

Origin

from Latin; compare with -ory1.

Definition of -orium in:

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Word of the day oleaginous
Pronunciation: ˌəʊlɪˈadʒɪnəs
adjective
rich in, covered with, or producing oil; oily