Is “Daylong” a Scrabble word?
Yes
DAYLONG
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 Daylong
adjective
1.Which lasts a day, or approximately so.
adverb
1.Throughout the day.