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Definition of hibernaculum


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hi·ber·nac·u·lum  audio  (hbr-nky-lm) KEY  

NOUN:
Biology pl. hi·ber·nac·u·la   (-l) KEY  
  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.

ETYMOLOGY:
Latin hbernculum, winter residence, from hbernre, to winter, from hbernus, relating to winter; see ghei- in Indo-European roots


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The American Heritage® Dictionary of the English Language, Fourth Edition.
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