tracing thread

14 LETTERS · STARTS WITH T

tracing thread is a valid 14-letter word worth 20 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1R1A1C3I1N1G2T1H4R1E1A1D2

1 + 1 + 1 + 3 + 1 + 1 + 2 + 0 + 1 + 4 + 1 + 1 + 1 + 2 =20 PTS

DOUBLE WORD → 40TRIPLE WORD → 60

MEANING

What does tracing thread mean?