noun
1. : a graduated scale or wheel on the mounting of an equatorial telescope for indicating right ascension or declination
2. : coordinate scales on any optical pointing instrument (as a surveyor's transit)
noun
1. : a graduated scale or wheel on the mounting of an equatorial telescope for indicating right ascension or declination
2. : coordinate scales on any optical pointing instrument (as a surveyor's transit)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012