chemoreceptor
Concise Oxford English Dictionary © 2008 Oxford University Press:
chemoreceptor /ˈkiːməʊrɪˌsɛptə, ˌkɛm-/
▶noun Physiology a sensory cell or organ responsive to chemical stimuli.
– derivatives
chemoreception noun.
chemoreception noun.
'chemoreceptor' also found in these Oxford entries:

