Is “Demisemiquaver” a Scrabble word?
Yes
DEMISEMIQUAVER
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 Demisemiquaver
/dɛmɪˈsɛmɪkweɪvə(ɹ)/
noun
1.A thirty-second note, drawn as a crotchet with three tails.