transparent quartz, especially when colorless.
a pure transparent colourless quartz, used in electronic and optical equipment. Formula: SiO2
noun 1. Geology. a continuous process by which rocks are created, changed from one form to another, destroyed, and then formed again. noun 1. another name for geological cycle noun the process by which rocks are formed, altered, destroyed, and reformed by geological processes and which is recurrent, returning to a starting point Usage Note […]
noun 1. a European pigeon, Columba livia, from which most domestic pigeons have been developed. noun 1. a common dove, Columba livia, from which domestic and feral pigeons are descended. It has a pale grey plumage with black-striped wings
noun 1. a crushed limestone sprayed on surfaces in mines to make coal dust incombustible in case of a gas explosion.
verb (used without object) 1. to move or sway to and fro or from side to side. 2. to be moved or swayed powerfully with excitement, emotion, etc. 3. Mining. (of sand or gravel) to be washed in a cradle. 4. to dance to or play rock music. 5. (of popular music) to have the […]