Is “Photomask” a Scrabble word?
Yes
PHOTOMASK
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 Photomask
noun
1.A transparent quartz block marked with many high-resolution images; a series of them are used in the photolithography of integrated circuits, one for each layer