• Webster's Revised Unabridged Dictionary
    • Hibernaculum (Zoöl) A little case in which certain insects pass the winter.
    • Hibernaculum (Bot) 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.
    • Hibernaculum Winter home or abiding place.
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Century Dictionary and Cyclopedia
    • n hibernaculum Same as hibernacle, 1.
    • n hibernaculum In dot., any part of a plant which protects an embryonic organ during the winter, as a bud or bulb. Also hibernacle.
    • n hibernaculum In zoology: One of the winter buds of a polyzoan; an arrested and encysted polyzoön-bud capable of surviving the winter and germinating in the following spring.
    • n hibernaculum The false opercule or pseudoperculum of a snail.
    • ***
Chambers's Twentieth Century Dictionary
    • Hibernaculum any part of a plant protecting an embryonic organ during the winter
    • ***


Webster's Revised Unabridged Dictionary
See Hibernacle
Chambers's Twentieth Century Dictionary
L. hibernāre, -ātumhibernus, wintry—hiems, winter.


In literature:

Hibernaculum: a tent or sheath made out of a leaf or other material in which a larva hides or hibernates.
"Explanation of Terms Used in Entomology" by John. B. Smith
The frogs and toads are all in their hibernaculums in the ground.
"Ways of Nature" by John Burroughs
Probably Ludlow Cave, along with the several abandoned coal mines in the county, serves as a hibernaculum for some species of bats.
"Mammals of Northwestern South Dakota" by Kenneth W. Andersen
Soil temperatures were taken in the present study only when the turtle was in a form, hibernaculum, or den.
"Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz" by John M. Legler
I back-tracked him from his faltering efforts, and where his first lusty jump showed on the thawing ground I found his hibernaculum.
"Everyday Adventures" by Samuel Scoville