agnosia

noun

ag·​no·​sia ag-ˈnō-zhə 

-shə

: loss or diminution of the ability to recognize familiar objects or stimuli usually as a result of brain damage

Word History

Etymology

borrowed from German Agnosie, borrowed from Greek agnōsía "lack of knowledge, ignorance," from a- a- entry 2 + -gnōsia (from gnôsis "knowledge" + -ia -ia entry 1) — more at gnosis

First Known Use

1883, in the meaning defined above

Medical Definition

agnosia

noun

ag·​no·​sia ag-ˈnō-zhə  -shə 

: loss or diminution of the ability to recognize familiar objects or stimuli usually as a result of brain damage see visual agnosia