1. An instrument used to distribute a substance over a surface or area.
2. A device for spacing or parting structures.
gutta-percha spreader, an instrument used in dentistry for condensing gutta-percha laterally in a root canal.
rib spreader, an instrument for widening the space between ribs in intrathoracic operations.
root canal spreader, a tapered instrument utilised for condensing root filling materials laterally.