napier's rods

NOUN
13 LETTERS · STARTS WITH N

napier's rods is a valid 13-letter word worth 14 points in Scrabble and 16 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
N1A1P3I1E1R1'0S1R1O1D2S1
1 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 0 + 1 + 1 + 2 + 1 =14 PTS
DOUBLE WORD → 28TRIPLE WORD → 42
MEANING

What does napier's rods mean?

NOUN · 1 SENSE
1

A set of graduated rods formerly used to do multiplication and division by a method invented by John Napier.