Is “Trigram” a Scrabble word?
Yes
TRIGRAM
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 Trigram
noun
1.Any of the eight combinations of three complete or broken lines forming half of a hexagram in Chinese system of divination I Ching.
2.A trigraph.
3.A special case of the n-gram where n is 3, used in natural language processing for doing statistical analysis of texts