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:
optigraphs

Origin of Optigraph

  • Compare French opticographe.

    From Wiktionary

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optigraph