OPTIGRAPH


Meaning of OPTIGRAPH in English

( a. )

A telescope with a diagonal eyepiece, suspended vertically in gimbals by the object end beneath a fixed diagonal plane mirror. It is used for delineating landscapes, by means of a pencil at the eye end which leaves the delineation on paper.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.