Hibernaculum /(?)/

Hi·ber·nac·u·lum

Hibernaculum

n.
  1. 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. (Bot.)
  2. A little case in which certain insects pass the winter. (Zool.)
  3. Winter home or abiding place.