/di pres"euhr/ , n.
1. a person or thing that depresses.
2. Surg. an instrument for pressing down a protruding part, as a tongue depressor.
3. Anat.
a. a muscle that draws down a part of the body, as the corner of the mouth. Cf. levator .
b. Also called depressor nerve . a nerve that, when stimulated, induces a decrease in activity, as a slowed heartbeat.
[ 1605-15; deprimere (see DEPRESS, -TOR) ]