onion structure

15 LETTERS · STARTS WITH O

onion structure is a valid 15-letter word worth 16 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

O1N1I1O1N1S1T1R1U1C3T1U1R1E1

1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does onion structure mean?