/trans mit"euhr, tranz-/ , n.
1. a person or thing that transmits.
2. Also called transmitting set . Radio. a device for sending electromagnetic waves; the part of a broadcasting apparatus that generates and modulates the radiofrequency current and conveys it to the antenna.
3. the part of a telephonic or telegraphic apparatus that converts sound waves or mechanical movements into corresponding electric waves or impulses.
4. Biochem. neurotransmitter.
[ 1720-30; TRANSMIT + -ER 1 ]