See Also: heliography(medicine)
heliography(dictionary)

heliography (iou)



heliography noun. M18.
[from HELIO- + -GRAPHY.]
(A) description of the sun. M18.
An early photographic process using iodine-sensitized silver plate and an asphalt or bitumen varnish. obsolete exc. Hist. M19.
Signalling by means of a heliograph (HELIOGRAPH noun 4). L19.
helio'graphic adjective pertaining to heliography;
heliographic latitude,
heliographic longitude, the latitude, longitude, of points on the sun's surface, referred to the sun's equator and a meridian passing through the node of this with the ecliptic: E18.
helio'graphically adverb by means of heliography L19.