manograph

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noun

An optical device for making pressure volume diagrams for high-speed engines, involving a light-tight box or camera having at one end a small convex mirror reflecting a beam of light onto the ground glass or photographic plate at the other end. The mirror is pivoted so that it can be moved so as to copy the motion of the engine piston on a smaller scale.

OriginAncient Greek μανός →
Scrabble 17
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Meanings

nounmanograph (plural manographs)

plural manographs

  1. An optical device for making pressure volume diagrams for high-speed engines, involving a light-tight box or camera having at one end a small convex mirror reflecting a beam of light onto the ground glass or photographic plate at the other end. The mirror is pivoted so that it can be moved so as to copy the motion of the engine piston on a smaller scale.

    In addition to the ordinary type of indicator, the Author describes the Hospitalier and the Schultze manographs, in which the diagram is produced photographically by reflecting a beam of light from a mirror attached to a diaphragm […]

    1909, Minutes of Proceedings of the Institution of Civil Engineers

Origin

  1. Ancient Greekμανός“thin, rare”
  2. Englishmanograph

From Ancient Greek μανός (manós, “thin, rare”) + -graph.

More words from Ancient Greek

Full word history & related roots →

Translations

French manographe
  • manographeoptical device
Cite this entry
APA

manograph. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/manograph

MLA

“manograph.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/manograph. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “manograph,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/manograph.

Source: manograph on Wiktionary, CC BY-SA 4.0.