Terminator

Terminator (Latin, roughly the finisher) is a word used differently in many contexts.

• The Terminator is a movie, where the bad cyborg terminates (ends) lifes.
• In genetics, a terminator marks the end of a gene on the DNA for transcription.
• In astronomy, the terminator is the line between the day side and the night side of a planetary body. Examination of the terminator can yield information about the surface of the body; for example, a fuzzy terminator indicates the presence of an atmosphere.