释义 |
helispherical, a.|hɛlɪˈsfɛrɪkəl| [irreg. f. helix + spherical.] Winding spirally upon a sphere. helispherical line: the line traced upon the terrestrial sphere by a ship sailing constantly towards the same point of the compass (other than the four cardinal points), which winds spirally round the pole, continually approaching but never reaching it; otherwise called the loxodromic curve or rhumb-line.
a1646J. Gregory Posthum. (1650) 285 (T.) They are helispherical lines, as they call them. 1659Moxon Tutor Astron. i. (1686) 9 The Rhumbs are neither circles nor streight Lines, but Helispherical or Spiral lines. 1796Hutton Math. Dict., Helispherical line is the Rhumb line in Navigation. |