from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A protective capsule that contains eggs, produced by certain insects, mollusks, and elasmobranch fishes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A protective capsule that contains the eggs of some insects and molluscs
  • noun The leathery egg of certain marine animals such as sharks and skate


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