Hibernacle

1. n. That which serves for protection or shelter in winter; winter quarters; as, the hibernacle of an animal or a plant.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.