English dictionary
sphincter
/'sf/I//N/kt/@/r/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
adjective
-
Of, pertaining to, or designating, a sphincter; as, a <i>sphincter</i> muscle.
Source: webster1913
noun
-
a ring of muscle that contracts to close an opening
Source: WordNet 3.0
-
A muscle which surrounds, and by its contraction tends to close, a natural opening; as, the <i>sphincter</i> of the bladder.
Source: webster1913