Is “Zeroth” a Scrabble word?
Yes
ZEROTH
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 Zeroth
/ˈzɪəɹəʊθ/
adjective
1.In the initial position in a sequence whose elements are numbered starting at zero; the ordinal number corresponding to zero.
“The zeroth order polynomial approximation is constant.”
2.Corresponding to a position preceding the first.
“A and C are in equilibrium following the Zeroth Law of Thermodynamics.”