loxodograph means an apparatus that records the course that a ship has travelled. Lexicurio rates it Sui generis — a strength score of 90 out of 100.
noun
- An apparatus that records the course that a ship has travelled“For this purpose he has contrived an instrument which he calls a "loxodograph," which consists of a compass placed below the ordinary ship's compass, so as to occupy the same relative position in the ship, and so that it can be compared from time to time with the normal instrument.”