What is osteoporosis? Osteoporosis is a disease in which bones become weak and are more likely to fracture or break. It is called a âsilentâ disease because bone loss often occurs without your knowing it. Until about age 30, your body forms enough new bone to replace the bone that is naturally broken down by the body (a process called bone turnover).
yinâ² and yangâ². n. (in Chinese philosophy and religion) two principles, one negative, dark, and feminine (yin), and one positive, bright, and masculine (yang), whose interaction influences the destinies of creatures and things.
(yin) [Chinese] in Chinese philosophy, the passive, negative, feminine principle that is complementary to yang; see yin, under principle. a polarized aspect of châ²i that is passive or negative energy. See also châ²i, yang. a Chinese philosophy that each entity is one, but contains two equal and opposite forces.