Receptor may refer to: Sensory receptor, in physiology, any structure which, on receiving environmental stimuli, produces an informative nerve impulse Receptor (biochemistry), in biochemistry, a protein molecule that receives and responds to a neurotransmitter, or other substance Cell surface receptor, a receptor on the outer surface of a cell membrane, that takes part in communication between the cell and the outside world Nuclear receptor, a receptor found within cells that is responsible for sensing steroid and thyroid hormones and certain other molecules Immune receptor, a receptor that occurs on the surface of immunocytes and binds to antigens Receiver (radio), a device for the reception of electromagnetic signals.