Is “Twelvemo” a Scrabble word?
Yes
TWELVEMO
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 Twelvemo
noun
1.Duodecimo, or 12mo, a paper size, so called because it is cut 12 to a (huge, originally made) sheet
2.A page, book etc. of that size
Synonyms: 12mo, 12º, D, duodecimo, 12mo, 12º