- Optigraph
- 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]
The Collaborative International Dictionary of English. 2000.