A murderer.
An animal that kills humans.
Someone who habitually seduces men.
Someone who terminates or ends something, especially (in later use) an assassin or exterminator.
An electrical device that absorbs reflection at the end of a transmission line.
The line between the day side and the night side of a moon, planet or other celestial body.
A text character that serves to mark the end of a document or transmission.
A DNA sequence which causes RNA transcription to cease and an mRNA transcript to break off.
An intelligent android created to destroy humans.