Is “Codon” a Scrabble word?
Yes
CODON
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 Codon
/ˈkəʊdɒn/
noun
1.A handbell used for summoning monks.
2.The "bell" or flaring mouth of a trumpet.