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fluor-spar

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fluor-spar
fluor-spar Min. (ˈfluːəspɑː(r)) [f. fluor + spar.] Native fluoride of calcium (Ca F2); found abundantly in Derbyshire (where one variety is known as Blue John), and hence often called Derbyshire spar.1794 Kirwan Min. I. 127, 3{supd} Family, Foliated or sparry, Fluor spar. 1812 Sir H. Davy Chem. Phil... Oxford English Dictionary
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fluorite
fluorite Min. (ˈfluːəraɪt) [f. fluor + -ite.] = fluor-spar.1868 Dana Min. p. xxx, Fluor was written fluorite last century by Napione. 1887 ― Min. & Petrogr. 228 Massive fluorite receives a high polish. Oxford English Dictionary
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fluorescence
fluorescence (fluːəˈrɛsəns) [f. fluor-spar): see quot. 1852.] The coloured luminosity produced in some transparent bodies by the direct action of light, esp. of the violet and ultra-violet rays; the property, in certain substances, of rendering the ultra-violet rays visible, so as to produce this ph... Oxford English Dictionary
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fluor
fluor, n. (ˈfluːɔː(r)) Also 7 -our. [a. L. fluor flowing, f. fluĕre to flow. Cf. OF. flueur.] † 1. A flow or flowing; a flux, stream. Also = effluvium 2 b. Obs.1644 Digby Nat. Bodies i. xxi. 189 These fluours do proceed out of the very substance and nature of the loadestone. 1664 Power Exp. Philos. ... Oxford English Dictionary
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phosphorescent
phosphorescent, a. (n.) (fɒsfəˈrɛsənt) [f. phosphor-us: see -escent. So in Fr. (Dict. Acad. 1835).] Having the property of shining in the dark; luminous without combustion or without sensible heat; self-luminous.1766 Da Costa in Phil. Trans. LVI. 39 It detonates with small phosphorescent sparks. 180... Oxford English Dictionary
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luminesce
luminesce, v. (l(j)uːmɪˈnɛs) [Back-formation from luminescent.] intr. To become luminescent.1896 S. P. Thompson in Jrnl. Oxf. Univ. Junior Scientific Club II. No. 40. 67 Substances such as glass lose the power of luminescing when raised to temperatures such that they become conductors of electricity... Oxford English Dictionary
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Blue-John
ˈBlue-John † 1. = after-wort. Hence fig. Obs.1672 Marvell Reh. Transp. I. 82 His Defence was but the blew-John of his Ecclesiastical Policy, and this Preface the Tap-droppings of his Defence. 1683 Salmon Doron Med. i. 242 Brewers Afterworts, or Wash, called ‘Blew-John’. 2. A local name of the blue F... Oxford English Dictionary
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Mohs
Mohs (məʊz) The name of Friedrich Mohs (see mohsine), used attrib. and in the possessive (chiefly in Mohs('s) scale) with reference to a scale of hardness he devised in which ten reference minerals that include very soft and very hard ones are assigned values of one to ten in order of increasing har... Oxford English Dictionary
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framed
▪ I. framed, ppl. a. (freɪmd) [f. frame v. + -ed1.] In senses of the vb; spec. in U.S. of houses (cf. frame n. 10, 15).c 1440 Promp. Parv. 176/1 Framyd, dolatus. 1496 in C. Welch Tower Bridge (1894) 83 [The carriage of loads of ‘framed timber’ figures in the accounts of 1496.] 1566 in Peacock Eng. C... Oxford English Dictionary
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diactinic
diactinic, a. Optics. (daɪækˈtɪnɪk) [f. di-3 = dia-1 +Gr. ἀκτίν- a ray + -ic.] Having the property of transmitting the actinic rays of light.1867 W. A. Miller Elemen. Chem. i. (ed. 4) 230 Rock-salt, fluor-spar, water..are almost as diactinic..as quartz. 1880 19th Cent. Mar. 529 Substances which are ... Oxford English Dictionary
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thermoluminescence
thermolumiˈnescence [f. thermo- + luminescence.] Luminescence resulting from exposure to high temperature; spec. as used as a means of dating ancient pottery and other material.1897 J. J. Thomson in Smithsonian Rep. (1898) 158 The phenomenon called by its discoverer, Prof. E. Wiedemann, thermolumine... Oxford English Dictionary
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quartz
quartz Min. (kwɔːts) [a. G. quarz (first in MHG.) of uncertain origin: hence also Du. kwarts, F. quartz, It. quarzo.] 1. A widely diffused mineral, massive or crystallizing in hexagonal prisms; in a pure form consisting of silica or silicon dioxide (SiO2), but varying greatly in colour, lustre, etc.... Oxford English Dictionary
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purple
▪ I. purple, a. and n. (ˈpɜːp(ə)l) Also 3 purpel, 4–5 purpul, 4–6 -pyl, 5 -pyll, 5–6 -pylle, -pull, -e, -pil(l. [ONorthumb. purple, early ME. purpel, purpul, altered from purpre, purper purpur, with l for r after preceding r, as in marbre, marble. In the OE. purpure, ME. purpre, purper, purpur, the ... Oxford English Dictionary
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