ria

Fumatorium \Fu`ma*to"ri*um\, n.; L. pl. {-ria}. [NL., fr. L. fumare, fumatum, to smoke.] An air-tight compartment in which vapor may be generated to destroy germs or insects; esp., the apparatus used to destroy San Jos['e] scale on nursery stock, with hydrocyanic acid vapor. [Webster 1913 Suppl.]