natural classification

22 LETTERS · STARTS WITH N

natural classification is a valid 22-letter word worth 28 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

N1A1T1U1R1A1L1C3L1A1S1S1I1F4I1C3A1T1I1O1N1

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

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does natural classification mean?