amoeba

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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