hibernaculum

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hi·ber·nac·u·lum

 (hī′bər-năk′yə-ləm)
n. pl. hi·ber·nac·u·la (-lə) Biology
1. A protective case, covering, or structure, such as a plant bud, in which an organism remains dormant for the winter.
2. The shelter of a hibernating animal.

[Latin hībernāculum, winter residence, from hībernāre, to winter, from hībernus, relating to winter; see ghei- in Indo-European roots.]

hibernaculum

(ˌhaɪbəˈnækjʊləm) or

hibernacle

n, pl -ula (-jʊlə) or -les
1. (Zoology) the winter quarters of a hibernating animal
2. (Biology) the protective case or covering of a plant bud or animal
[C17: from Latin: winter residence; see hibernate]

hi•ber•nac•u•lum

(ˌhaɪ bərˈnæk yə ləm)

also hi•ber•nac•le

(ˈhaɪ bərˌnæk əl)

n., pl. -nac•u•la (-ˈnæk yə lə) also -nac•les.
1. a protective case or covering for winter, as of an animal or a plant bud.
2. winter quarters, as of a hibernating animal.
[1690–1700; < Latin hībernāculum winter residence =hībernā(re) (see hibernate) + -culum -cule2]