amoeba

[uh-mee-buh]
noun, plural amoebas, amoebae [uh-mee-bee] .
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World English Dictionary
amoeba or ameba (əˈmiːbə)
 
n , pl -bae, -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
 
[C19: from New Latin, from Greek amoibē change, from ameibein to change, exchange]
 
ameba or ameba (əˈmiːbə, -biː)
 
n
 
[C19: from New Latin, from Greek amoibē change, from ameibein to change, exchange]
 
a'moebic or ameba
 
adj
 
a'mebic or ameba
 
adj

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Etymonline
Word Origin & History

amoeba
1855, from Mod.L. genus name (1841), from Gk. amoibe "change," related to ameibein "to change, exchange," from PIE *e-meigw-, extended form of base *mei- "to change, go, move" (see mutable). So called for its constantly changing shape.

amoebae
classical pl. of amoeba (q.v.); see -ae.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

amoeba a·moe·ba (ə-mē'bə)
n.
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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American Heritage
Science Dictionary
amoeba   (ə-mē'bə)  Pronunciation Key 
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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American Heritage
Cultural Dictionary
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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