depressor: Meaning and Definition of

de•pres•sor

1. a person or thing that depresses.
2. an instrument for pressing down a protruding part, as a tongue depressor.
1. a muscle that draws down a part of the body, as the corner of the mouth. Cf. levator.
2. Also calleddepres&prim;sor nerve&sec;.a nerve that, when stimulated, induces a decrease in activity, as a slowed heartbeat.