n.[C]

1. 傳送者；傳遞者；傳輸者；傳播者
   Monkeys are transmitters of a number of dangerous diseases.

   猴子是許多危險疾病的傳染媒介。

2. （電話的）送話器，話筒
3. 發報機；發射機；發射臺

n.

1. a device or installation used to generate and transmit electromagnetic waves carrying messages or signals, especially those of radio or television.
2. short for neurotransmitter.