• synonyms


  1. any of numerous protozoa of the widespread subphylum (or superclass) Rhizopoda, characterized by a pseudopod and comprising most members of the phylum Sarcodina, including the amebas and foraminifers.
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Origin of rhizopod

First recorded in 1850–55, rhizopod is from the New Latin word Rhizopoda name of the superclass. See rhizo-, -pod
Related formsrhi·zop·o·dan [rahy-zop-uh-dn] /raɪˈzɒp ə dn/, adjective, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for rhizopods

Historical Examples

  • For what is the peculiarity of the Rhizopods, exemplified by the Amœba?

    Essays: Scientific, Political, & Speculative, Vol. I

    Herbert Spencer

  • I have repeatedly noticed the action of alcohol on rhizopods.

  • For a long while they were believed to be living animals, like the rhizopods.

  • All of them are extremely simple in structure, and some of them, as the Rhizopods, almost structureless.

  • Most of the ciliated infusoria and many of the rhizopods (amœba) are cathodically sensitive or negatively galvanotactic.

    The Wonders of Life

    Ernst Haeckel

British Dictionary definitions for rhizopods


  1. any protozoan of the phylum Rhizopoda, characterized by naked protoplasmic processes (pseudopodia). The group includes the amoebas
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  1. of, relating to, or belonging to the Rhizopoda
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Derived Formsrhizopodan (raɪˈzɒpədən), adjective, nounrhizopodous, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

rhizopods in Science


  1. Any of various protozoans of the group Rhizopoda, characteristically moving and taking in food by means of pseudopods. Rhizopods include amoebas and radiolarians.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.