from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A protective capsule of certain animals, such as insects and mollusks, that contains eggs; an ootheca.
  • n. See egg sac.

from Wiktionary, Creative Commons Attribution/Share-Alike License

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


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