pro·pri·o·cep·tor (prō'prē-ō-sěp'tər) n. A sensory receptor, found chiefly in muscles, tendons, joints, and the inner ear, that detects the motion or position of the body or a limb by responding to stimuli arising within the organism.
[Latin proprius, one's own; see per1 in Indo-European roots + (re)ceptor.] pro'pri·o·cep'tive adj.