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prothalloid
Variant of prothallium
noun pl. prothallia
Bot. a minute, flat, greenish disc of cells bearing sex organs on its lower side, usually attached to the ground by single-celled hairs, and forming the haploid, sexual generation of ferns and similar plants
also prothallus
Related Forms:
- prothallial adjective or prothalloid
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
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