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. OriginMid 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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