ISINGLASSES
Scrabble letter values: I1S1I1N1G2L1A1S1S1E1S1 = 12
Definition
ISINGLASSES is the plural of ISINGLASS.
noun ISINGLASS: any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves.
Synonyms of ISINGLASS: mica