Is “Stilb” a Scrabble word?
Yes
STILB
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Stilb
noun
1.A unit of luminance equal to one candela per square centimetre