| 单词 | longitudinal system |
| 释义 | > as lemmaslongitudinal system longitudinal system n. †(a) Geometry a spherical coordinate system based on the measurement of angular distance along two great circles which intersect at right angles at the pole (obsolete rare); (b) Botany the vascular system in plants, which conducts water and nutrients, consisting of xylem, phloem, and associated tissues. ΚΠ 1835 T. S. Davies in Ladies' Diary 61 We may consider the point m defined by the relation between os and or... This system is called the longitudinal system of spherical coordinates, the arcs os and or being measured in the same manner as longitudes on the earth. 1837 Edwards's Bot. Reg. 23 1928 The whole of the horizontal cellular system decays, leaving behind it the longitudinal system in the form of a woody skeleton. 1931 Bot. Gaz. 92 438 Phloem rays, only a few cells in width, may subdivide these regions of the longitudinal system. 2012 D. Pigott Lime-trees & Basswoods iii. 30/1 The secondary xylem of Tilia consists of a normal longitudinal system of water-conducting and mechanical tissues and a radial transverse system of medullary rays. < as lemmas |
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