Is “Maximal” a Scrabble word?
Yes
MAXIMAL
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 Maximal
noun
1.The element of a set with the greatest magnitude.
2.Said of an ideal of a ring or a filter of a lattice: that it is as large as it can be without being trivial (improper).
3.Said of a set of well-formed formulas: that it is as large as it can be without being inconsistent; i.e. that for any well-formed formula φ, the set contains either φ or ~φ.
Synonyms: maximum
adjective
1.Largest, greatest (in magnitude), highest, most.
Synonyms: maximum