FUMATORIUM
Noun
fumatorium (plural fumatoria or fumatoriums)
An airtight compartment in which vapour may be generated to destroy germs or insects; especially, the apparatus used to destroy San Jose scale on nursery stock, using hydrocyanic acid vapour.
Source: Wiktionary
Fu`ma*to"ri*um, n.; L. pl. -ria (#). [NL., fr. L. fumare, fumatum, to
smoke.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition