| 单词 | rustball |
| 释义 | > as lemmasrustball rustball n. Geology a roughly spherical mass or nodule of iron ore; (also more widely) a lump of oxidized iron. ΚΠ 1684 R. Plot Minute 8 Feb., in R. T. Gunther Early Sci. Oxford 1925 IV. 36 Dr. Plot shew'd us some Rosemary balls, which are of ye nature of Mr. Lister's Rust-balls, and were dug in Staffordshire. 1751 T. Salmon New Geogr. & Hist. Gram. (ed. 2) i. v. 128 They resemble our English Rust Balls; and when broke are full of Streaks from the Circumference to the Center. 1789 G. White Nat. Hist. Selborne 10 Among the blue rags turn up..every now and then balls of a friable substance, like rust of iron, called rust balls. 1902 C. Reid Geol. Ringwood ii. 6 This belt of flintless or almost flintless chalk..is soft, often full of rust-balls or nodules of pyrites, and contains but few fossils. 2000 Ann. Amer. Schools Oriental Res. 57 179/1 A hydria whose neck had been broken off in antiquity contained at least 3.5 kg of iron ‘rustballs’. < as lemmas |
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