1. sender, transmitter, communicator

usage: someone who transmits a message; "return to sender"

2. vector, transmitter, agent

usage: any agent (person or animal or microorganism) that carries and transmits a disease; "mosquitos are vectors of malaria and yellow fever"; "fleas are vectors of the plague"; "aphids are transmitters of plant diseases"; "when medical scientists talk about vectors they are usually talking about insects"

3. transmitter, sender, set

usage: set used to broadcast radio or tv signals

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