ACROAGNOSIA By N., Sam M.S. - April 7, 2013 noun. Absence of awareness of an appendage. Persons with this ailment do not sense their appendage even while they can see their arm, leg, etc. ACROAGNOSIA: "It was as if her entire arm was completely numb and while she could see her arm, she could not feel it's presence- the doctor diagnosed her with acroagnosia."