respiratory pigment

19 LETTERS · STARTS WITH R

respiratory pigment is a valid 19-letter word worth 28 points in Scrabble and 32 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1E1S1P3I1R1A1T1O1R1Y4P3I1G2M3E1N1T1

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

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does respiratory pigment mean?