Terminator

Ter´mi`na`tor

n.	1.	One who, or that which, terminates.
	2.	(Astron.) The dividing line between the illuminated and the unilluminated part of the moon.

Noun

terminator - someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects)

Synonyms: eradicator, exterminator

(electronics)

terminator - A resistor connected to a signal wire in a bus or network for the purpose of impedance matching to prevent reflections.

For example, a 50 ohm resistor connected across the end of an Ethernet cable. SCSI chains and some LocalTalk wiring schemes also require terminators.