a sense organ, or one of its cells (such as those for the sense of taste or smell), that can respond to a chemical stimulus; a chemosensor

plural of chemoreceptor

(physiology, neuroscience) An area of the medulla oblongata, located in the area postrema, that receives inputs from blood-borne drugs or hormones, and communicates with other structures in the vomiting center to initiate vomiting.