hyperostosis
noun
hy·per·os·to·sis ˌhī-pər-ˌä-ˈstō-səs 
plural hyperostoses ˌhī-pər-ˌä-ˈstō-ˌsēz
: excessive growth or thickening of bone tissue
hyperostotic
ˌhī-pər-ˌä-ˈstä-tik
adjective 
Example Sentences
Recent Examples on the Web For the past 10 years, Dripps had struggled with spinal deterioration and had a dual diagnosis of diffuse idiopathic skeletal hyperostosis and ankylosing spondylitis. 
Janelle Walker, Elgin Courier-News, 10 July 2018
Janelle Walker, Elgin Courier-News, 10 July 2018 Word History
Etymology
New Latin
First Known Use
circa 1836, in the meaning defined above
Medical Definition
hyperostosis
noun
hy·per·os·to·sis ˌhī-pə-ˌräs-ˈtō-səs
plural hyperostoses -ˈtō-ˌsēz
: excessive growth or thickening of bone tissue