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egg sac

   Also found in: Encyclopedia 0.03 sec.
egg sac
n.
The silken pouch in which many spiders deposit their eggs. Also called egg case.

egg sac
The silken pouch in which many spiders deposit their eggs. Also called egg case.


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Typically, the adult female spider lays a hundred or more eggs in a round silk sac In some species, the female carries the egg sac with her until the eggs hatch.
Intriguingly, the spiders make prey pellets and egg sacs that were the same size as its own body.
Besides making prey-snaring webs, spiders use their silk to wrap up food, drop down from high places, and form egg sacs, Bourgeois's giant spider carries just such a sac beneath her abdomen, although this one is woven out of metal and filled with marble eggs.
 
 
 
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