Tripod

Part of speech: noun (n.)

1. Any utensil or vessel, as a stool, table, altar, caldron, etc., supported on three feet.

2. A three-legged frame or stand, usually jointed at top, for supporting a theodolite, compass, telescope, camera, or other instrument. Tripod of life, or Vital tripod (Physiol.), the three organs, the heart, lungs, and brain; -- so called because their united action is necessary to the maintenance of life.