from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Excessive or abnormal thickening or growth of bone tissue.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An excessive growth or thickening of bone
from The Century Dictionary and Cyclopedia
- n. A morbid outgrowth of bone from a bone.
- n. An overgrowth of bone; a normal (not morbid) exostosis or increase of bony tissue.
hyper- + ost(eo)- + -osis.(American Heritage® Dictionary of the English Language, Fourth Edition)