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calc-spar
calc-spar Min. (ˈkælkˈspɑː(r)) [see calc-.] Calcareous spar or rhombohedral crystallized carbonate of lime.1822 Mrs. Lowry Convers. Min. II. 28 Most of the fine calcspar of Derbyshire is of a deep topaz yellow colour. 1850 Daubeny Atom. The. viii. (ed. 2) 267 Why..do the particles of carbonate of li...
Oxford English Dictionary
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calcareous
calcareous, -ious, a. (kælˈkɛərɪəs) [f. L. calcāri-us of lime (f. calc-em + -ārius) + -ous. The spelling in -eous, which appeared about 1790, is erroneous, influenced by words in -eous, from L. -eus. The etymological sense of calcar-eous would be ‘of the nature of a spur’.] Of the nature of (carbona...
Oxford English Dictionary
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heavy spar
heavy spar [transl. of Ger. Schwerspat, the name given by Werner in 1774.] The native sulphate of barium, barytes; also improperly applied to barium carbonate, and sometimes to the sulphate and carbonate of strontia (Page Geol. Terms).1789 A. Crawford in Med. Commun. II. 353 The muriated barytes..wa...
Oxford English Dictionary
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calcite
calcite Min. (ˈkælsaɪt) [mod. (Haidinger 1845 calcit) f. L. calc-em lime + -ite, q.v.] The native crystallized rhombohedral anhydrous carbonate of lime (calcium carbonate), which exists in an immense variety of forms: calc-spar, calcareous spar. Taken by Dana as the type of the Calcite Group of anhy...
Oxford English Dictionary
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hislopite
hislopite Min. (ˈhɪzləpaɪt) [f. the name of the Rev. Stephen Hislop (1817–63), Scottish missionary and naturalist: see -ite1.] An Indian variety of calcite coloured green by the presence of glauconite.1859 S. Haughton in Phil. Mag. XVII. 18, I propose to give the name of Hislopite to the remarkable ...
Oxford English Dictionary
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comptonite
comptonite Min. (ˈkɒmptənaɪt) [named 1821 by Brewster after Earl Compton who brought it from Vesuvius: see -ite.] A mineral of the zeolite family, occurring in cavities of trap-rock and old lavas; the same as thomsonite.1822 Cleaveland Min. 386. 1865 Page Handbk. Geol. Terms, Comptonite..occurring w...
Oxford English Dictionary
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rhombohedral
rhombohedral, a. (rɒmbəʊˈhiːdrəl) [f. next + -al1.] Pertaining to or having the form of a rhombohedron; Cryst., denoting a system in which all the forms are derivable from the rhombohedron; also, belonging to this system.1830 H. J. Brooke in Encycl. Metrop. (1845) VI. 432/1 The rhombohedral [system ...
Oxford English Dictionary
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nail-head
ˈnail-head [f. nail n. + head n.1] 1. The head of a nail. Also fig.1683 Moxon Mech. Exerc., Printing x. ¶9 The Plate..with the extuberancies of Nail-heads would hinder the free sliding of the Quoins. 1839 Ure Dict. Arts 876 Compressing the metal into the shape of a nail-head. 1855 Rambler III. 239 M...
Oxford English Dictionary
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