You searched for: “os
ora, os.
Mouth.

A medical term used in prescriptions.

Units related to: “os
(Greek: Atlas, atlas; Atlant[os])
(Greek: containing, or derived from keratin, a highly insoluble scleroprotein that is the main constituent of horny tissues, the nails, and the organic matrix of tooth enamel; derived from Greek kera[s], kerat[os], "horn")