egg case

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egg case

n.
1. A protective capsule that contains eggs, produced by certain insects, mollusks, and elasmobranch fishes.
2. See egg sac.

o•o•the•ca

(ˌoʊ əˈθi kə)

n., pl. -cae (-sē).
a case or capsule containing eggs, as that of certain insects and mollusks.
[1850–55; < New Latin; see oo-, theca]
o`o•the′cal, adj.