compound function

17 LETTERS · STARTS WITH C

compound function is a valid 17-letter word worth 28 points in Scrabble and 37 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1M3P3O1U1N1D2F4U1N1C3T1I1O1N1

3 + 1 + 3 + 3 + 1 + 1 + 1 + 2 + 0 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does compound function mean?