NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,051 terms related to cancer and medicine.
- listen (OS-tee-oh-PEE-nee-uh)
- A condition in which there is a lower-than-normal bone mass or bone mineral density (the amount of bone mineral contained in a certain amount of bone). Osteopenia is a less severe form of bone loss than osteoporosis.