vernier telescope

17 LETTERS · STARTS WITH V

vernier telescope is a valid 17-letter word worth 23 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

V4E1R1N1I1E1R1T1E1L1E1S1C3O1P3E1

4 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 3 + 1 =23 PTS

DOUBLE WORD → 46TRIPLE WORD → 69

MEANING

What does vernier telescope mean?