Enter a clue or pattern or both:
The Clue
Scale named for a French mathematician (7 letter answer)
The Answer
VERNIER
Tags
Notes
The answer VERNIER is so rare that it appears less than once every 2500 puzzles.
Definition
VERNIER as a noun:
1. (vernier scale, vernier) = a small movable scale that slides along a main scale; the small scale is calibrated to indicate fractional divisions of the main scale
2. (Vernier, Paul Vernier) = French mathematician who described the vernier scale (1580-1637)