n. [ Gr. &unr_; thin, rare + -graph: cf. F. manographe. ] (Engin.) An optical device for making an indicator diagram for high-speed engines. It consists of a light-tight box or camera having at one end a small convex mirror which reflects a beam of light on to the ground glass or photographic plate at the other end. The mirror is pivoted so that it can be moved in one direction by a small plunger operated by an elastic metal diaphragm which closes a tube connected with the engine cylinder. It is also moved at right angles to this direction by a reducing motion, called a reproducer, so as to copy accurately on a smaller scale the motion of the engine piston. The resultant of these two movements imparts to the reflected beam of light a motion similar to that of the pencil of the ordinary indicator, and this can be traced on the sheet of ground glass, or photographed. [ Webster 1913 Suppl. ]

n. [ Mono- + -graph. ] A written account or description of a single thing, or class of things; a special treatise on a particular subject of limited range. [ 1913 Webster ]

n. A writer of a monograph. [ 1913 Webster ]

{ } a. [ Cf. F. monographique. ] Of or pertaining to a monograph, or to a monography; as, a monographic writing; a monographic picture. -- Mon`o*graph"ic*al*ly, adv. [1913 Webster]

n. One who writes a monograph. [ 1913 Webster ]

a. Monographic. [ Obs. ] [ 1913 Webster ]

n. [ Mono- + -graphy: cf. F. monographie. ] 1. Representation by lines without color; an outline drawing. [ 1913 Webster ]

2. A monograph. [ Obs. ] [ 1913 Webster ]