Iceland+spar
21calc-spar — Calcite Cal cite (k[a^]l s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble.… …
22Icelandspar — Iceland spar n. A doubly refracting transparent calcite used in optical instruments. * * * …
23Calcite — A one inch Calcite Rhomb that shows the Double image refraction property. General Category Carbonate mineral …
24calcite — calcitic /kal sit ik/, adj. /kal suyt/, n. one of the commonest minerals, calcium carbonate, CaCO3, found in a great variety of crystalline forms: a major constituent of limestone, marble, and chalk; calc spar. [1840 50; CALC + ITE1] * * * Most… …
25radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
26Stilbite — from Kiui Island, Alaska, USA General Category Zeolite Chemical formul …
27History of Physics — History of Physics † Catholic Encyclopedia ► History of Physics The subject will be treated under the following heads: I. A Glance at Ancient Physics; II. Science and Early Christian Scholars; III. A Glance at Arabian Physics; IV.… …
28Calcite — Cal cite (k[a^]l s[imac]t), n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also …
29Against the Day — infobox Book | name = Against the Day image caption = First edition cover author = Thomas Pynchon country = United States language = English genre = Novel publisher = Penguin Press release date = November 21, 2006 pages = 1085 pp media type =… …
30Viking — Pour les articles homonymes, voir Viking (homonymie). Représentation de Vikings datant du IXe ou du Xe siècle. Un Viking (vieux norrois víkingr, pluriel víkingar) est un explorate …
