Is “Trisomy” a Scrabble word?
Yes
TRISOMY
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 Trisomy
/ˈtɹʌɪ.sə(ʊ)mi/
noun
1.The presence of three copies, instead of the normal two, of a particular chromosome of an organism.