noun
: a visual telescope mounted rigidly parallel to a photographic telescope and used by an observer to supplement the clock motion in maintaining immovable the image of a heavenly body on the photographic plate
noun
: a visual telescope mounted rigidly parallel to a photographic telescope and used by an observer to supplement the clock motion in maintaining immovable the image of a heavenly body on the photographic plate
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012