rhumb Meaning, Definition & Usage

  1. noun a line on a sphere that cuts all meridians at the same angle; the path taken by a ship or plane that maintains a constant compass direction
    rhumb line; loxodrome.

WordNet

Rhumb noun
Etymology
F. rumb, Sp. rumbo, or Pg. rumbo, rumo, probably fr. Gr. a magic wheel, a whirling motion, hence applied to a point of the compass. See Rhomb.
Definitions
  1. (Navigation) A line which crosses successive meridians at a constant angle; -- called also rhumb line, and loxodromic curve. See Loxodromic.

Webster 1913