cubic content unit

NOUN
18 LETTERS · STARTS WITH C

cubic content unit is a valid 18-letter word worth 24 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3U1B3I1C3C3O1N1T1E1N1T1U1N1I1T1
3 + 1 + 3 + 1 + 3 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 =24 PTS
DOUBLE WORD → 48TRIPLE WORD → 72
MEANING

What does cubic content unit mean?