Webster’s Revised Unabridged Dictionary · 1913
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 José scale on nursery stock, with hydrocyanic acid vapor.