sphincter

n. a ring-shaped muscle that partly or wholly closes a body orifice, such as the anal sphincters or the iris of the eye.

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Psychology term of the day

December 25th 2024

motor aphasia

a form of nonfluent aphasia characterized by difficulty in producing articulate speech. An example is Broca’s aphasia, for which motor aphasia is often used as a synonym. See also aphemia.