Is “Fresnel” a Scrabble word?
Yes
FRESNEL
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 Fresnel
noun
1.A unit of frequency equal to 1012 hertz, or one terahertz.
2.A Fresnel lens or a light feature using such a lens