society > communication > telecommunication > radio communications > radio equipment > [noun] > relay or repeater (3)
a place or thing which acts as or provides a relay (in various senses); (Physiology) a structure in the nervous system which relays impulses.
Telecommunications. = relay, n.1 4b. Frequently attributive.
Telecommunications. An installation, device, or satellite which receives, amplifies, and retransmits radio signals so that they can be received…