DICT.TW Dictionary Taiwan
3.141.42.41
Search for:
▼[Show options]
[Pronunciation] [Help] [Database Info] [Server Info]

1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Op·ti·graph n.  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.
 ◄ ►