Definition of skiagraphy in English:

skiagraphy

(British sciagraphy)

noun

  • The use of shading and the projection of shadows to show perspective in architectural or technical drawing.

    • ‘His first process, sciagraphy or photogenic drawing, had been an invention.’
    • ‘These methods differed from contemporary pictorial practices by their greater science - particularly the use of shadow projection (skiagraphy).’

Origin

Late 16th century: from French sciagraphie, via Latin from Greek skiagraphia, from skia shadow.

Pronunciation:

skiagraphy

/skīˈäɡrəfē/