Source : Webster's Revised Unabridged Dictionary (1913)

Amoeba \A*m[oe]"ba\, n.; pl. L. {Am[oe]b[ae]}; E. {Am[oe]bas}.
   [NL., fr. Gr. ? change.] (Zo["o]l.)
   A rhizopod. common in fresh water, capable of undergoing many
   changes of form at will. See {Rhizopoda}.