'Sphincter' definitions:

Definition of 'sphincter'

From: WordNet
noun
A ring of muscle that contracts to close an opening [syn: sphincter, anatomical sphincter, sphincter muscle]

Definition of 'Sphincter'

From: GCIDE
  • Sphincter \Sphinc"ter\, a. (Anat.) Of, pertaining to, or designating, a sphincter; as, a sphincter muscle. [1913 Webster]

Definition of 'Sphincter'

From: GCIDE
  • Sphincter \Sphinc"ter\, n. [NL., fr. ??? to bind tight.] (Anat.) A muscle which surrounds, and by its contraction tends to close, a natural opening; as, the sphincter of the bladder. [1913 Webster]

Synonyms of 'sphincter'

From: Moby Thesaurus