track mark

10 LETTERS · STARTS WITH T

track mark is a valid 10-letter word worth 21 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1R1A1C3K5M3A1R1K5

1 + 1 + 1 + 3 + 5 + 0 + 3 + 1 + 1 + 5 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does track mark mean?