I. noun a single-celled animal which catches food and moves about by extending finger-like projections of protoplasm. Amoebas are either free-living in damp environments or parasitic.●Many families and genera in the phylum Rhizopoda, kingdom Protista, including the aquatic Amoeba proteus. II. derivatives 1. amoebic /əˈmiːbɪk / adjective
2. amoeboid /əˈmiːbɔɪd / adjective
– origin mid 19th cent.: modern Latin, from Greek amoibē ‘change, alternation’.