Definitions of amoeba

1. A rhizopod. common in fresh water, capable of undergoing many changes of form at will. See Rhizopoda.

2. A microscopic organism of the simplest structure, being a mere mass of protoplasm, which absorbs its food at every point all over its body by means of processes, which arc locomotive also, protruded therefrom at will, so that it is constantly changing its shape.

3. A protozoon in which the shape is subject to constant alterations due to the formation and retraction of pseudopodia.