calcificationnoun [ C or U ]
uk/ˌkæl.sɪ.fɪˈkeɪ.ʃən/us/ˌkæl.sə.fəˈkeɪ.ʃən/specializeda gradual increase in the amount of calcium in body tissue, sometimes as a response to injury, causing the tissue to harden, or an area of such tissue:
Arterial walls may develop calcifications, which reduce the ability of the vessels to transport blood adequately.