Is “Polysynthetic” a Scrabble word?
Yes
POLYSYNTHETIC
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 Polysynthetic
/ˌpɒlisɪnˈθɛtɪk/
adjective
1.(grammar, of languages) Characterized by a prevalence of relatively long words containing a large number of morphemes. Typically, the morphemes are bound.
2.Having layers of twin crystals