英语词汇“infralateral tangent arcs”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	infralateral tangent arcs
释义	infralateral tangent arcs infralateral tangent arcs [¦in·frə¦lad·ə·rəl ′tan·jənt ‚ärks] (meteorology) Two oblique, colored arcs, convex toward the sun and tangent to the halo of 46° at points below the altitude of the sun, produced by refraction (90° effective prism angle) in hexagonal columnar ice crystals whose principal axes are horizontal but randomly directed in azimuth; if the sun's elevation exceeds about 68°, the arcs cannot appear.
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