What does heliograph mean?

Definitions for heliograph
ˈhi li əˌgræf, -ˌgrɑfhe·li·o·graph

Here are all the possible meanings and translations of the word heliograph.

Princeton's WordNet

  1. heliographverb

    an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on

  2. heliographverb

    signal by means of a mirror and the using the sun's rays

Wiktionary

  1. heliographnoun

    An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.

  2. heliographnoun

    A heliogram.

  3. heliographnoun

    An instrument for measuring the intensity of sunlight.

  4. heliographnoun

    A device for photographing the sun.

  5. heliographnoun

    A photograph.

  6. heliographverb

    To send a message by heliograph.

  7. heliographverb

    To send a heliograph.

Webster Dictionary

  1. Heliographnoun

    a picture taken by heliography; a photograph

    Etymology: [Helio- + -graph.]

  2. Heliographnoun

    an instrument for taking photographs of the sun

    Etymology: [Helio- + -graph.]

  3. Heliographnoun

    an apparatus for telegraphing by means of the sun's rays. See Heliotrope, 3

    Etymology: [Helio- + -graph.]

Freebase

  1. Heliograph

    A heliograph is a wireless solar telegraph that signals by flashes of sunlight reflected by a mirror. The flashes are produced by momentarily pivoting the mirror, or by interrupting the beam with a shutter. The heliograph was a simple but effective instrument for instantaneous optical communication over long distances during the late 19th and early 20th century. Its main uses were military, survey and forest protection work. Heliographs were standard issue in the British and Australian armies until the 1960s, and were used by the Pakistani army as late as 1975.

Chambers 20th Century Dictionary

  1. Heliograph

    hē′li-o-graf, n. an apparatus for signalling by means of the sun's rays: an engraving obtained by a process in which a specially prepared plate is acted on chemically by exposure to light: an apparatus for taking photographs of the sun.—v.t. to signal to by means of the sun's rays.—n. Heliog′rapher.—adjs. Heliograph′ic, -al.—adv. Heliograph′ically.—ns. Heliog′raphy, a method of communicating swiftly between distant points by means of the sun's rays reflected from mirrors: photography; Heliogrā′vure (or hā-li-ō-gra-vür′), photo-engraving, or a print obtained by this process. [Gr. hēlios, the sun, graphē, a painting—graphein, to write.]

The Standard Electrical Dictionary

  1. Heliograph

    An apparatus for reflecting flashes of light to a distant observer. By using the Morse telegraph code messages may thus be transmitted long distances. When possible the sun's light is used.

Matched Categories

How to pronounce heliograph?

  1. Alex
    US English
    Daniel
    British
    Karen
    Australian
    Veena
    Indian

How to say heliograph in sign language?

Numerology

  1. Chaldean Numerology

    The numerical value of heliograph in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of heliograph in Pythagorean Numerology is: 9

Images & Illustrations of heliograph

  1. heliograph

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