Is “Helical” a Scrabble word?
Yes
HELICAL
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 Helical
/ˈhiːlɪkəl/
adjective
1.In the shape of a helix.