辉长岩 Traditional form: 輝長岩 Pinyin (reading): huīchángyán Definitions: gabbro (geology) Characters: 辉 - brightness, luster 长 - long, lasting; to excel in 岩 - cliff; rocks; mountain Traditional characters: 輝 - brightness, luster 長 - long, lasting; to excel in 岩 - cliff; rocks; mountain