英语词汇heliograph的起源、历史背景-英语词源词典

词汇	heliograph
词源	heliograph n. 1848, "instrument for taking photographs of the sun," from helio- "sun" + -graph "something written." Earlier, "a description of the sun" (1706, implied in heliographic). From 1877 as the name of a movable mirror used in signaling. Related: Heliographical. Heliography (1845) was the word for the product of a type of engraving process by chemical reaction from exposure to sunlight. It also was an early term for what came to be called photography (1840). Entries linking to heliograph helio- word-forming element meaning "sun," from Greek hēlios "sun" (from PIE root *sawel- "the sun"). -graph modern word-forming element meaning "instrument for recording; that which writes, marks, or describes; something written," from Greek -graphos "-writing, -writer" (as in autographos "written with one's own hand"), from graphe "writing, the art of writing, a writing," from graphein "to write, express by written characters," earlier "to draw, represent by lines drawn" (see -graphy). Adopted widely (Dutch -graaf, German -graph, French -graphe, Spanish -grafo). Related: -grapher; -graphic; -graphical. updated on October 14, 2021
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heliograph n.