Optigraph \Op"ti*graph\, n. [Optic + -graph: cf. F.
opticographe. See {Optic}, 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.
[1913 Webster]