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hortorium

noun
hor·​to·​ri·​um | \hȯ(r)ˈtōrēəm, -tȯr-\
plural hortoriums\-​ēəmz \ or hortoria\-​ēə \

Definition of hortorium 

: an institution or museum for the collection, preservation, and study of horticultural specimens

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History and Etymology for hortorium

New Latin, from Latin hortus + -orium -ory

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