"morbid absorption of bone, so that it becomes abnormally porous," 1846, from osteo- "bone" + Greek poros "passage; pore; voyage" (see pore (n.)) + -osis. Related: Osteoporotic.
ostentatious
osteo-
osteology
osteopath
osteopathy
osteoporosis
ostinato
ostler
Ostmark
ostomy
ostracean
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}