egg case

noun
1.
Entomology, ootheca.
2.
Entomology, egg sac.

Origin:
1840–50

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
egg case  
  1. A protective capsule of certain animals, such as insects and mollusks, that contains eggs.

  2. See egg sac.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Two hundred or more mantis nymphs may emerge from a single egg case.
Larval appendages can be seen at the top of the egg case.
One case being investigated is the sea turtle egg case mentioned previously.
When the egg hatches, the larva stays in its hanging egg case, reaches into the pile of caterpillars and begins feeding.
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