osteoporosis

• POS: Noun
• HYPHEN: os=te=o=por=o=sis

CIDE DICTIONARY

osteoporosis, n. [NL.; osteo- + Gr. po`ros pore.].

 An absorption of bone so that the bone tissue becomes unusually porous. It occurs especially in elderly men and postmenopausal women, and predisposes the elderly to fractures of the bones.  [Webster 1913 Suppl.]

OXFORD DICTIONARY

osteoporosis, n. a condition of brittle and fragile bones caused by loss of bony tissue, esp. as a result of hormonal changes, or deficiency of calcium or vitamin D.

Etymology

OSTEO- + Gk poros passage, pore