tris2Pronunciation: /trɪs/Definition of tris noun [mass noun] an organophosphorus compound, used as a flame retardant. Alternative name: tris-2,3-dibromopropylphosphate; chemical formula: (Br2C3H5)3PO4 Origin: 1970s: from tris-, the prefix of the systematic nametris in other Oxford dictionaries Definition of tris in the US English dictionary
