(Physiology)an organ or cell able to respond to light, heat, or other external stimulus and transmit a signal to a sensory nerve (生理)感受器 ■a region of tissue, or a molecule in a cell membrane, which responds specifically to a particular neurotransmitter, hormone, antigen, or other substance 受体
语源
early 20th cent.: coined in German from Latin receptor, from recept- 'taken back', from the verb recipere (see receive)