Is “Fission” a Scrabble word?
Yes
FISSION
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 Fission
/ˈfɪʃən/
noun
1.The process whereby one item splits to become two.
2.Short for nuclear fission: The process of splitting the nucleus of an atom into smaller particles.
3.The process by which a bacterium splits to form two daughter cells.
verb
1.To cause to undergo fission.
2.To undergo fission.