The similar powdery matter ejected from volcanoes; = volcanic ash n. at volcanic, adj. n.compounds 2. (For other special products of similar…
| 单词 | θ5807 |
| 释义 | the world > the earth > structure of the earth > constituent materials > ejected volcanic material > [noun] > ash (6) ash1667 The similar powdery matter ejected from volcanoes; = volcanic ash n. at volcanic, adj. n.compounds 2. (For other special products of similar… pozzolana1684 A volcanic ash, containing silica, alumina, lime, etc., found near Pozzuoli and in the neighbourhood of various volcanoes, and used in the… volcanic ash1776 loose fragmented solid material ejected from a volcano, esp. (in later use) such material in the form of powder (cf. tephra, n.); (also) pumice. trinacrite1854 a brown variety of palagonite, n. (Now considered as a rock.) Santorin earth1868 In full Santorin earth. A natural volcanic ash, similar to pozzolana, found on the island of Thira in the Cyclades. pumicite1916 A volcanic ash with a composition similar to pumice but deposited as powder or granules, widely used in the manufacture of lightweight concrete and… |
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