anal sphincter
McGraw-Hill Science & Technology Dictionary:
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anal sphincter
(′ān·əl ′sfiŋk·tər)
(anatomy) Either of two muscles, one voluntary and the other involuntary, controlling closing of the anus in vertebrates.
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anal sphincter
American Heritage Stedman's Medical Dictionary:
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anal sphincter
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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