\Hi`ber*nac"u*lum\, n. [See {Hibernacle}.]
1. (Bot.) A winter bud, in which the rudimentary foliage or
   flower, as of most trees and shrubs in the temperate zone,
   is protected by closely overlapping scales.
2. (Zo["o]l.) A little case in which certain insects pass the
   winter.
3. Winter home or abiding place. --J. Burroughs.