terminator

[tur-muh-ney-ter] Origin

ter·mi·na·tor

[tur-muh-ney-ter]
noun
1.
a person or thing that terminates.
2.
Astronomy. the dividing line between the illuminated and the unilluminated part of a satellite or planet, especially the moon.

Origin:
1760–70; < Late Latin terminātor, equivalent to terminā(re) to terminate + -tor -tor
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Terminator is always a great word to know.
So is horizon. Does it mean:
the small circle of the celestial sphere whose plane is tangent to the earth at the position of the observer
a zodiacal constellation between Virgo and Serpens also called the Balance
Collins
World English Dictionary
terminator (ˈtɜːmɪˌneɪtə)
 
n
the line dividing the illuminated and dark part of the moon or a planet

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

terminator
1770, "line of separation between the bright and dark parts of a moon or planet," from L. terminator, from terminare (see terminus). Meaning "one who terminates (something)" is attested from 1846.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
FOLDOC
Computing Dictionary

terminator definition

electronics
A resistor connected to a signal wire in a bus or network for the purpose of impedance matching to prevent reflections.
For example, a 50 ohm resistor connected across the end of an Ethernet cable. SCSI chains and some LocalTalk wiring schemes also require terminators.
(1995-05-17)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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