: any of a large genus of protozoans that have no permanent cell organs or structures, that change shape to form temporary lobes for moving and taking in food, and that are widespread …

An amoeba or ameba / əˈmiːbə / (pl.: amoebas or amebas (less commonly, amoebae or amebae / əˈmiːbi /)), [1] often called an amoeboid, is a type of cell or unicellular organism with the ability …

Amoeba, any of the microscopic unicellular protozoans of the rhizopodan order Amoebida. The well-known type species, Amoeba proteus, is found on decaying bottom vegetation of …

Aug 18, 2025 · Amoebas are microscopic, single-celled organisms, a diverse group of protozoans. They are found globally in various environments, from aquatic settings to soil. …

Add to word list biology a type of organism that has one cell (Definition of amoeba from the Cambridge Academic Content Dictionary © Cambridge University Press)

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 …

Aug 21, 2025 · An amoeba is a single-celled microorganism that lacks both shape and color. Its structure resembles the structure of jelly, and it could take on another shape. Its body is …

Definition of amoeba noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Amoeba (also spelled ameba) is a genus of protozoa that moves by means of temporary projections called pseudopods (false feet), and is well-known as a representative unicellular …

Sep 21, 2025 · An amoeba (or ameba) is a type of single-celled organism within the kingdom Protista, commonly characterized by its amorphous shape and ability to move and feed using …