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[uh-mee-buh] /əˈmi bə/
noun, plural amoebas, amoebae
[uh-mee-bee] /əˈmi bi/ (Show IPA)
1. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for amoeba


noun (pl) -bae (-biː), -bas
any protozoan of the phylum Rhizopoda, esp any of the genus Amoeba, able to change shape because of the movements of cell processes (pseudopodia). They live in fresh water or soil or as parasites in man and animals
Derived Forms
amoebic, (US) amebic, adjective
Word Origin
C19: from New Latin, from Greek amoibē change, from ameibein to change, exchange
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
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Word Origin and History for amoeba

1855, from Modern Latin Amoeba, genus name (1841), from Greek amoibe "change," related to ameibein "to change, exchange," from PIE *e-meigw-, extended form of root *mei- "to change, go, move" (see mutable). So called for its constantly changing shape. Related: Amoebaean; amoebic.

Online Etymology Dictionary, © 2010 Douglas Harper
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amoeba in Medicine

amoeba a·moe·ba (ə-mē'bə)
Variant of ameba.

Amoeba A·moe·ba (ə-mē'bə)
n. pl. a·moe·bas or a·moe·bae (-bē)

  1. A genus of protozoa of the class Sarcodina or Rhizopoda.

  2. Any of several genera of protozoa that are parasitic in humans, especially Entamoeba.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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amoeba in Science
Plural amoebas or amoebae (ə-mē'bē)
Any of various one-celled aquatic or parasitic protozoans of the genus Amoeba or related genera, having no definite form and consisting of a mass of protoplasm containing one or more nuclei surrounded by a flexible outer membrane. Amoebas move by means of pseudopods.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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amoeba in Culture
amoeba [(uh-mee-buh)]

An animal composed of only one cell that has no fixed shape. It is the best known of the single-celled animals, or protozoa.

Note: The term amoeba is sometimes used to refer to something with an indefinite, changeable shape.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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amoeba in Technology

1. A distributed operating system developed by Andrew S. Tanenbaum and others of Vrije Universiteit, Amsterdam. Amoeba is only available under licence from the VUA, but is free of charge and includes all source, binaries and documentation.
2. A derogatory term for Commodore's Amiga personal computer.
[Jargon File]
The Free On-line Dictionary of Computing, © Denis Howe 2010
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