斜长石 Traditional form: 斜長石 Pinyin (reading): xiéchángshí Definitions: plagioclase (rock-forming mineral, type of feldspar) Characters: 斜 - slanting, sloping, inclined 长 - long, lasting; to excel in 石 - stone, rock, mineral Traditional characters: 斜 - slanting, sloping, inclined 長 - long, lasting; to excel in 石 - stone, rock, mineral