Source : Webster's Revised Unabridged Dictionary (1913)

Brumal \Bru"mal\, a. [L. brumalis, fr. bruma winter: cf. F.
   brumal.]
   Of or pertaining to winter. ``The brumal solstice.'' --Sir T.
   Browne.

Source : WordNet®

brumal
     adj : characteristic of or relating to winter; "bears in brumal
           sleep" [syn: {hibernal}, {hiemal}]