zenithal passage
plural of zeunerite
present participle of ingendre
The passing of the sun directly overhead such that no shadows are cast by a pole sticking straight up from the ground. These conditions only occur in locations between the Tropic of Cancer and the Tropic of Capricorn.
(organic chemistry) A red chemical pigment from the insect kermes dye named 1-methyl-2-carboxy-3,5,6,8-tetrahydroxyanthraquinone.
キト上空での天頂通過では、太陽が真上を通過して棒に影ができない現象が正午に起こり、博物館の職員たちは真っ直ぐな柱が影を落とさない様子を実演した。
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