Is “Ordinal” a Scrabble word?
Yes
ORDINAL
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 Ordinal
/ˈɔː(ɹ).dɪ.nəl/
noun
1.An ordinal number such as first, second and third.
“The most common numerals in Latin, as in English, are the "cardinals"...and the "ordinals"... — F. M. Wheelock, Wheelock’s Latin, 6th ed. revised (2005), p97”
2.A book used in the ordination of Anglican ministers, or in certain Roman Catholic services
adjective
1.(of a number) indicating position in a sequence
2.Of or relating to the groupings called orders
3.Intercardinal