sphincter
2 synonyms for sphincter, grouped by meaning and by how common each one is.
Noun — A ring of muscle around a body opening that tightens or relaxes to control what passes through it.
Synonyms
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Etymology
A learned borrowing from Late Latin sphinctēr, from Ancient Greek σφιγκτήρ (sphinktḗr, "band, contractile muscle") — possibly related to "sphinx," meaning roughly "the strangler."
Full origin of sphincter →