Hypertext Webster Gateway: "rhumb"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Rhumb \Rhumb\, n. [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}.] (Navigation)
A line which crosses successive meridians at a constant
angle; -- called also {rhumb line}, and {loxodromic curve}.
See {Loxodromic}.
{To sail on a rhumb}, to sail continuously on one course,
following a rhumb line.
From WordNet (r) 1.7 (wn)
rhumb
n : 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 [syn: {rhumb line}, {loxodrome}]
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