Is “Brachistochrone” a Scrabble word?
Yes
BRACHISTOCHRONE
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 Brachistochrone
noun
1.A cycloid; the curve of fastest descent between two points.