- a curve on the surface of a sphere that cuts all meridians at the same angle. It is the path taken by a vessel or aircraft that maintains a constant compass direction.
Origin of rhumb line
First recorded in 1660–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- an imaginary line on the surface of a sphere, such as the earth, that intersects all meridians at the same angle
- the course navigated by a vessel or aircraft that maintains a uniform compass heading
Often shortened to: rhumb
C16: from Old Spanish rumbo, apparently from Middle Dutch ruum space, ship's hold, but also influenced by Latin rhombus