sci-
combining form 
or scio- also scia- or skia-
Etymology: New Latin, from Greek ski-, skio-, from skia — more at scene 
 : shadow 
< sciogram >
< scioptic >
< scialytic >
< skiascope >
or scio- also scia- or skia-
< sciogram >
< scioptic >
< scialytic >
< skiascope >