re ‧ cep ‧ tor /rɪˈseptə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ receipt , receipts, ↑ receiver , ↑ reception , ↑ receivership , ↑ receiving , ↑ receptionist , ↑ receptor ; adjective : ↑ receptive ≠ UNRECEPTIVE , ↑ received ; verb : ↑ receive ]
a nerve ending which receives information about changes in light, heat etc and causes the body to react in particular ways