ter·mi·na·tor
(tûr′mə-nā′tər)n.
1. One that terminates: a terminator of unpopular policies.
2. The dividing line between the bright and shaded regions of the disk of a moon or planet that is illuminated by the sun.
3. A sequence of nucleotides that signals the end of transcription or translation and the completion of the synthesis of a nucleic acid or protein molecule.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
terminator
(ˈtɜːmɪˌneɪtə)n
(Astronomy) the line dividing the illuminated and dark part of the moon or a planet
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ter•mi•na•tor
(ˈtɜr məˌneɪ tər)n.
1. one that terminates.
2. the dividing line between the bright side and the dark side of a moon or planet.
[1760–70; < Late Latin terminātor <terminā(re) to terminate]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
terminator - someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects)