phosphorograph

noun
phos·​phoro·​graph | \fäˈsfȯrəˌgraf, -rȧf\

Definition of phosphorograph 

: 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

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Other Words from phosphorograph

phosphorographic \¦fäsfərə¦grafik \ adjective
phosphorography \ˌfäsfəˈrägrəfē \ noun plural -es

History and Etymology for phosphorograph

phosphor- + -graph

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