os

²os

noun \ˈōs\

plural ora\ˈȯr-ə\

Definition of OS

: orifice

Origin of OS

Latin or-, os — more at oral

First Known Use: 1737

Other Anatomy Terms

bilateral symmetry, carotid, cartilage, dorsal, entrails, prehensile, renal, solar plexus, supine, thoracic, ventral

Rhymes with OS

Bose, close, dose, gross