GRAY SUBSTANCEgray substance · English · Reference checkedReferenceOpen English WordNet 2024oewn2024:lemma:GRAY SUBSTANCETier 1Ordinal155Pythagorean47Classical146Reverse196Reverse Reduction79Standard891Final Large891Ordinal126Reduced36Atbash653Isopsephy1682Ordinal161Abjad814