composite function

18 LETTERS · STARTS WITH C

composite function is a valid 18-letter word worth 28 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1M3P3O1S1I1T1E1F4U1N1C3T1I1O1N1

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

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does composite function mean?