hibernaculum

(hī′bər nak′yo̵̅o̅ ləm)

any case or covering for protecting an organism during the winter; specif.,

a bud or bulb for protecting a plant
a specially modified bud, as in some freshwater bryozoans, that can develop into a colony in the spring
a structure in which a dormant animal passes the winter

Origin: L, winter residence < hibernare: see hibernate

See hibernaculum in American Heritage Dictionary 4

noun pl. hi·ber·nac·u·la (-lə)
Biology

A protective case, covering, or structure, such as a plant bud, in which an organism remains dormant for the winter.
The shelter of a hibernating animal.

Origin:

Origin: Latin hībernāculum, winter residence

Origin: , from hībernāre, to winter

Origin: , from hībernus, relating to winter; see ghei- in Indo-European roots

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