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2 examples of terminator in sentences
The terminator, or boundary between light and shade, was not, as in the Moon, pretty sharply defined, and broken only by the mountainous masses, rings, and sea-beds, if such they are, so characteristic of the latter.
Mr. W.H. Pickering observed clouds on Mars 15 miles high; these are the 'projections' seen on the terminator when the planet is partially illuminated.