T1R1I1O1X8I1D2S1
16 points
TRIOXIDS is validvalid
TRIOXID, trioxide [n]
TRIOXID, an oxide containing three atoms of oxygen; as, sulphur trioxide, also TRIOXIDE [n]
TRIOXID, trioxide [n]
TRIOXID, an oxide containing three atoms of oxygen; as, sulphur trioxide, also TRIOXIDE [n]