Terminator
Pronunciation : Ter"mi*na`tor
Part of Speech : n.
Etymology : [L., he who limits or sets bounds.]
Definition : 1. One who, or that which, terminates.
2. (Astron.)
Defn: The dividing line between the illuminated and the unilluminated part of the moon.
Source : Webster's Unabridged Dictionary, 1913
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