OSTEOPOROSIS
osteoporosis
(noun) abnormal loss of bony tissue resulting in fragile porous bones attributable to a lack of calcium; most common in postmenopausal women
Source: WordNet® 3.1
Etymology
Noun
osteoporosis (countable and uncountable, plural osteoporoses)
(pathology) A disease, occurring especially in women following menopause, in which the bones become extremely porous and are subject to fracture.
Source: Wiktionary
Os`te*o*po*ro"sis, n. [NL.; osteo- + Gr. pore.] (Med. & Physiol.)
Definition: An absorption of bone so that the tissue becomes unusually
porous.
Source: Webster’s Unabridged Dictionary 1913 Edition