Dictionary.net

someone who transmits a message; "return to sender"

someone who transmits a message; "return to sender"

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".

One who, or that which, transmits; specifically, that portion of a telegraphic or telephonic instrument by means of which a message is sent; - opposed to receiver.

One who, or that which, transmits; specifically, that portion of a telegraphic or telephonic instrument by means of which a message is sent; - opposed to receiver.

One that sends over or through; especially, the mouthpiece of a telephone or the sending instrument of a telegraph.