- sciagraphA vertical section of a building; a sciagraphy.
- sciagraphyThe art of representing shadows as realistically as possible.
- scialyticDispelling shadows.
- sciomancydivination using shadows
- sciopticOf or relating to an optical arrangement for forming images in a darkened room.
- sciosophyFalse or pretended knowledge of science or natural phenomena.
- skiagramA picture or image created from shadows, especially with X-rays.
- skiascopeA retinoscope.
- skiascopyretinoscopy
- skiatronA kind of cathode ray tube that replaces the conventional light-emitting phosphor layer on the face of the tube screen with a scotophor such as potassium chloride.