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ameba

or a·moe·ba

[uh-mee-buh]
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noun, plural a·me·bas, a·me·bae [uh-mee-bee] /əˈmi bi/.
  1. any of numerous freshwater, marine, or parasitic one-celled protozoa of the order Amoebida, characterized by a granular nucleus surrounded by a jellylike mass of cytoplasm that forms temporary extensions, or pseudopodia, by which the organism moves, engulfs food particles, and forms food vacuoles.
  2. a protozoan of the genus Amoeba, inhabiting bottom vegetation of freshwater ponds and streams: used widely in laboratory studies.

Origin of ameba

< New Latin amoeba < Greek amoibḗ change, alternation, akin to ameíbein to exchange
Related formsa·me·ba·like, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ameba

Historical Examples

  • Yet, is man any less a unit than the Ameba, or any other simple organism?

    The Continental Monthly, Vol. 3, No. 1 January 1863

    Various

  • Some are simple like the ameba, others are very complex in structure.

    Being Well-Born

    Michael F. Guyer

  • The ameba solves this difficulty by dividing to form two amebæ.

    Being Well-Born

    Michael F. Guyer

  • The cells are better off than the ameba, for their food is brought to them.

    Applied Physiology

    Frank Overton

  • The cells are like the tiny animal, the ameba, and can take in the food by any part of their bodies.

    Applied Physiology

    Frank Overton


British Dictionary definitions for ameba

ameba

noun plural -bae (-biː) or -bas
  1. the usual US spelling of amoeba
Derived Formsamebic, 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

ameba in Medicine

ameba

n. pl. a•me•bas
  1. A protozoa of the genus Amoeba and of related genera, occurring in soil and water and parasitic in animals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ameba in Science

ameba

[ə-mēbə]
  1. Another spelling of amoeba.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.