sense organ

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A specialized organ or structure, such as the eye, ear, tongue, nose, or skin, where sensory neurons are concentrated and that functions as a receptor. Also called sensor.

Century Dictionary and Cyclopedia

1. n. Any organ of sense, as the eye, ear, or nose.
2. n. Specifically, a collection of nerve-cells which receive impressions from without (peripheral sense-organ), such as one of the taste-bulbs or tactile corpuscles; also a collection of nerve-cells in the cerebrospinal centers which translate such impressions into conscious sensation or reflex movement (central sense-organ).

Wiktionary

1. n. an organic sensor.

GNU Webster's 1913

1. n. (Physiol.) a specially irritable mechanism by which some one natural force or form of energy is enabled to excite sensory nerves; as the eye, ear, an end bulb or tactile corpuscle, etc.

WordNet 3.0

1. n. an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation