骨质疏松 gǔzhìshūsōng osteoporosis Origin Definitions Defs Strokes Stroke Words Sentences Sents 骨质 骨質 gǔzhì bone tissue The material and substance that makes up bone, consisting of a hard outer layer and a spongy inner layer; osseous tissue.疏松 疏鬆 shūsōng loose loose; puffy; not dense