double decomposition

NOUN /dəbəl_,dikɑmpə'zɪʃən/
20 LETTERS · 6 SYLLABLES · STARTS WITH D

double decomposition is a valid 20-letter word worth 29 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2O1U1B3L1E1D2E1C3O1M3P3O1S1I1T1I1O1N1
2 + 1 + 1 + 3 + 1 + 1 + 0 + 2 + 1 + 3 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does double decomposition mean?

NOUN · 1 SENSE
1

A chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB).