registered length

17 LETTERS · STARTS WITH R

registered length is a valid 17-letter word worth 22 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1E1G2I1S1T1E1R1E1D2L1E1N1G2T1H4

1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 1 + 1 + 1 + 2 + 1 + 4 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does registered length mean?