supplemental plumage

20 LETTERS · STARTS WITH S

supplemental plumage is a valid 20-letter word worth 30 points in Scrabble and 42 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1U1P3P3L1E1M3E1N1T1A1L1P3L1U1M3A1G2E1
1 + 1 + 3 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 2 + 1 =30 PTS
DOUBLE WORD → 60TRIPLE WORD → 90
MEANING

What does supplemental plumage mean?

1