A receptor is a protein on a cell that a specific chemical such as a neurotransmitter or hormone attaches to, which changes the cell's activity.
In English the usual term is receptor. Each type of receptor responds to particular chemicals. For example, dopamine receptors respond to dopamine but not to serotonin.
Many medicines work by attaching to receptors. Guanfacine, a non-stimulant ADHD medicine, acts on a type of noradrenaline receptor called alpha-2A. Stimulants mainly change how much dopamine and noradrenaline reach the receptors, rather than acting on the receptors directly.
The source term list called this receiver, a word that appears in texts translated from French. In brain science and medication, the English word is receptor. It does not mean a device for recording brain activity.