Is “Ischium” a Scrabble word?
Yes
ISCHIUM
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 Ischium
/ˈɪskɪəm/
noun
1.The lowest of the three bones that make up each side of the pelvis.