sphincter

sphincter is a topic covered in the Taber's Medical Dictionary.

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(sfingk′tĕr)

[Gr. sphinktēr, tight band]
A circular muscle constricting an orifice. In normal tonic condition, it closes the orifice, i.e., the muscle must relax to allow the orifice to open.

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(sfingk′tĕr)

[Gr. sphinktēr, tight band]
A circular muscle constricting an orifice. In normal tonic condition, it closes the orifice, i.e., the muscle must relax to allow the orifice to open.

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