Amnesia \Am*ne"si*a\, n. [NL., fr. Gr. ?; 'a priv. + ? to remember.]

(Med.) Forgetfulness; also, a defect of speech, from cerebral disease, in which the patient substitutes wrong words or names in the place of those he wishes to employ. --Quian.

Source: Webster's Revised Unabridged Dictionary (1913)