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. It moves by means of pseudopods.
[New Latin, genus name, from Greek amoibē, change, from ameibein, to change.]
amoebic a·moe'bic (-bĭk) adj.


