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单词 actine
释义

actine

/ˈaktiːn/
noun
1A proposed unit of the intensity of solar radiation. rare. Now historical.
2 Zoology. Each of the rays or points of a sponge spicule.

Origin

Mid 19th century; earliest use found in John Herschel (1792–1871), mathematician and astronomer. From ancient Greek ἀκτῖν-, ἀκτίς ray. With use in sense 1 compare quot. 1837, and also German †Actine.

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更新时间:2025/2/24 1:34:34