[roo-bee-kround] /ˈru biˌkraʊnd/
an olive-gray, American kinglet, Regulus calendula, the male of which has an erectile, ruby crest.
noun 1. glass having a red color resulting from the addition of gold, copper, or selenium to the batch. 2. any glass of a dark red color. noun 1. glass that has a deep rich red colour produced from oxides of various minerals, such as lead, copper, and iron
noun 1. a solid-state, pulsed laser that uses a ruby crystal to produce a very strong beam of red coherent light, used in making holographs and in cosmetic instruments.
noun 1. a female given name. noun (pl) -bies 1. a deep red transparent precious variety of corundum: occurs naturally in Myanmar and Sri Lanka but is also synthesized. It is used as a gemstone, in lasers, and for bearings and rollers in watchmaking. Formula: Al2O3 2. the deep-red colour of a ruby (as adjective): […]
noun, Mineralogy. 1. proustite. 2. pyrargyrite. noun 1. another name for proustite, pyrargyrite