单词 | calamite |
释义 | calamiten. 1. Palaeontology. A fossil plant, of a genus or order abundant in the Coal Measures, of which the stems are found in jointed fragments, ribbed and furrowed. They are generally considered to have been allied to the existing Equisetaceæ or Mare's-tails, but their stem was furnished with wood and bark. ΘΚΠ the world > plants > particular plants > plants and herbs > fossil plants > [noun] cycadite18.. Bothrodendron1835 lepidodendron1836 calamite1837 sphenophyllum1837 stigmaria1845 polyporite1846 fucoid1848 Muscites1859 lepidodendrid1863 Bennettites1871 lepidodendroid1872 progymnosperm1885 pteridosperm1904 Bennettitales1907 seed fern1907 1837 Penny Cycl. VII. 293/2 Calamites have been found with a diameter of fourteen inches. 1842 H. Miller Old Red Sandstone (ed. 2) vii. 175 Some plant resembling a calamite of the Coal Measures. 1873 J. W. Dawson Story Earth & Man v. 104 Calamites, gigantic and overgrown mares'-tails. 2. Mineralogy. A variety of tremolite (white hornblende) occurring in crystals sometimes reed-like. ΚΠ 1882 H. Watts Dict. Chem. III. 169 Calamite is an asparagus-green variety of tremolite, found..in Sweden. ΚΠ 1753 Chambers's Cycl. Suppl. This entry has not yet been fully updated (first published 1888; most recently modified version published online June 2018). < n.1753 |
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