A person who commits multiple (more than two) murders, especially similar ones with no obvious motive over a period of time with a "cooling-off" period between each murder.
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.