Definify.com

Webster 1913 Edition

Adj.

[L.

fumosus

, fr.

fumus

smoke: cf. F.

fumeux

Producing smoke; smoky.

Producing fumes; full of fumes.

Garlic, onions, mustard, and such-like fumous things.

Barough (1625).

fumous ‎(comparative more fumous, superlative most fumous)

(obsolete or literary) Of or resembling fumes or smoke.
- 1927, H. P. Lovecraft, The Dream-Quest of Unknown Kadath:
  Upon their heads were strapped vast helmet-like torches of glittering metal, from which the fragrance of obscure balsams spread in fumous spirals.