phosphorograph

noun

phos·​phoro·​graph

fäˈsfȯrəˌgraf,

-rȧf

: a photographic impression made by laying a phosphorescent body directly upon the photographic film in order to detect phosphorescence too feeble to be observed visually

phosphorographic

¦fäsfərə¦grafik

adjective

phosphorography

ˌfäsfəˈrägrəfē

noun

plural -es

Word History

Etymology

phosphor- + -graph

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