IPA: /ˌɛlɛk.trəʊˈrɛs.ɛp.tər/
KK: /ɪˌlɛk.trəʊ.rɪˈsɛp.tər/
A type of sensory organ found in some fish that can sense electric fields in the water.
Sharks use their electroreceptors to detect the electric signals produced by their prey.
Electroreceptor → It is formed from "electro-" (from Greek "ēlektron", meaning amber or electricity) and "receptor" (from Latin "recipere", meaning to receive). The word describes a sensory organ that receives electrical signals.
Think of 'electricity' ('electro-') being 'received' ('receptor') by a special organ — that's what an electroreceptor does.
No commonly confused words.