terminator
//ˈtɜːmɪneɪtə(r)//
Noun
terminatorSingular
terminatorsPlural
1
A person or thing that terminates or brings something to an end.
The new policy was the terminator of the old system.
2
The dividing line between the illuminated and dark parts of a celestial body, especially the moon or a planet.
The terminator on the moon is clearly visible during the first quarter phase.
3
A sequence of nucleotides in DNA that signals the end of transcription.
The terminator sequence signals RNA polymerase to stop transcription.