Loxodromic curve

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Related to Loxodromic curve: rhumb
(Geom.) a line on the surface of a sphere, which always makes an equal angle with every meridian; the rhumb line. It is the line on which a ship sails when her course is always in the direction of one and the same point of the compass.

See also: Loxodromic

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.