This is the 13396th most frequent Spanish word.
receptor
Receiver; a person or device that receives something.
In this sentence, 'receptor' refers to a person that receives something, in this case a message. It is a noun used to denote someone who is a recipient.
El receptor del mensaje no entendió el significado.
The recipient of the message did not understand its meaning.
Here, 'receptor' describes an entity that detects or receives stimuli, specifically referring to a biological sensory receptor.
El receptor sensorial detecta cambios en el entorno.
The sensory receptor detects changes in the environment.
In this context, 'receptor' refers to a mechanical or electronic device that receives signals, such as a television receiver.