or a·moe·ba

[ uh-mee-buh ]
/ əˈmi bə /

noun, plural a·me·bas, a·me·bae [uh-mee-bee] /əˈmi bi/.

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.
a protozoan of the genus Amoeba, inhabiting bottom vegetation of freshwater ponds and streams: used widely in laboratory studies.

Nearby words

  1. amchitka,
  2. amd,
  3. amdg,
  4. amdt.,
  5. ame damnee,
  6. amebiasis,
  7. amebic,
  8. amebic abscess,
  9. amebic colitis,
  10. amebic dysentery

Origin of ameba

< New Latin amoeba < Greek amoibḗ change, alternation, akin to ameíbein to exchange

Related formsa·me·ba·like, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for amebae


/ (əˈmiːbə) /

noun plural -bae (-biː) or -bas

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

Medicine definitions for amebae


n. pl. a•me•bas

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.

Science definitions for amebae


[ ə-mēbə ]

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