Is “Sextodecimos” a Scrabble word?
Yes
SEXTODECIMOS
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 Sextodecimos
noun
1.A size of a sheet of paper resulting from folding and cutting a sheet of paper into sixteenths (3.25"-5" x 5"-6.25").
2.A book consisting of pages of that size.
Synonyms: 16mo, 16º, S, sixteenmo, 16mo, 16º