Optigraph Definition
noun
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 an attached pencil.
Wiktionary
Other Word Forms of Optigraph
Noun
Singular:
optigraph
Plural:
optigraphsOrigin of Optigraph
-
Compare French opticographe.
From Wiktionary
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