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any of numerous freshwater, marine, or parasitic one-celled protozoa of the order amoebida, characterized by a granular nucleus surrounded by a jellylike m-ss 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.
historical examples

studies on some amoebae from the termite mirotermes, with notes on some other protozoa from the termitidae.
the biotic -ssociations of c-ckroaches louis m. roth

you can figure things out in your own little head instead of just getting along on dum psionic luck like us amoebae.
occasion for disaster gordon randall garrett

now, the amoebae have neither a nervous system nor distinguishable organs of any kind.
the life of the bee maurice maeterlinck

the amoebae are almost invariably found in the large intestine; one species, indeed, is termed amoeba coli.
encyclopaedia britannica, 11th edition, volume 8, slice 4 various

noun (pl) -bae (-biː), -bas
the usual us spelling of 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

cl-ssical plural of amoeba; see -ae.
n.

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.

ameba a·me·ba or amoeba (ə-mē’bə)
n. pl. a·me·bas or a·me·bae (-bē)
a protozoa of the genus amoeba and of related genera, occurring in soil and water and parasitic in animals.

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)

a genus of protozoa of the cl-ss sarcodina or rhizopoda.

any of several genera of protozoa that are parasitic in humans, especially entamoeba.

amoeba
(ə-mē’bə)
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 m-ss of protoplasm containing one or more nuclei surrounded by a flexible outer membrane. amoebas move by means of pseudopods.
ameba
(ə-mē’bə)
another spelling of amoeba.
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.