hydroxyapatite
noun
hy·droxy·ap·a·tite hī-ˌdräk-sē-ˈa-pə-ˌtīt 
variants or hydroxylapatite
hī-ˌdräk-sə-ˈla-pə-ˌtīt
: a complex phosphate of calcium Ca5(PO4)3OH that occurs as a mineral and is the chief structural element of vertebrate bone
Example Sentences
Recent Examples on the Web Use toothpaste and mouth rinse with hydroxyapatite or fluoride; potassium nitrate is also good for sensitivity and found in pastes like Sensodyne. 
Adam Hurly, Robb Report, 10 Dec. 2021 For example, the outer layer of a shark’s tooth is composed of an enameloid hydroxyapatite, similar to enamel in human teeth. Sora Kim, The Conversation, 12 July 2021 Then, there's Radiesse, which is made of calcium hydroxyapatite. Roxanne Adamiyatt, Town & Country, 22 Mar. 2021 There are two main different types of fillers: those made of hyaluronic acid (HA) and calcium hydroxyapatite (CaHA). Dori Price, Good Housekeeping, 5 Mar. 2021 The team’s printer extrudes layer upon layer of a compound made of hydroxyapatite and a biodegradable polyester that binds the layers of ink together. Karen Weintraub, Scientific American, 29 Sep. 2016 Made up mostly of hydroxyapatite, a relatively weak gemstone, teeth begin to rise from gummy ridges inside the mouth when a baby is around six months old. Brennan Kilbane, Allure, 15 Dec. 2020 Previous teams synthesized pins from hydroxyapatite, a major component in human and animal bones. Eva Frederick, Science | AAAS, 21 Nov. 2019 But, reports Wudan Yan at The New York Times, the dragonfish enamel is studded with tiny crystals made of hydroxyapatite, just 5-to-20-nanometers in diameter. Jason Daley, Smithsonian, 6 June 2019 See More
Adam Hurly, Robb Report, 10 Dec. 2021 For example, the outer layer of a shark’s tooth is composed of an enameloid hydroxyapatite, similar to enamel in human teeth. Sora Kim, The Conversation, 12 July 2021 Then, there's Radiesse, which is made of calcium hydroxyapatite. Roxanne Adamiyatt, Town & Country, 22 Mar. 2021 There are two main different types of fillers: those made of hyaluronic acid (HA) and calcium hydroxyapatite (CaHA). Dori Price, Good Housekeeping, 5 Mar. 2021 The team’s printer extrudes layer upon layer of a compound made of hydroxyapatite and a biodegradable polyester that binds the layers of ink together. Karen Weintraub, Scientific American, 29 Sep. 2016 Made up mostly of hydroxyapatite, a relatively weak gemstone, teeth begin to rise from gummy ridges inside the mouth when a baby is around six months old. Brennan Kilbane, Allure, 15 Dec. 2020 Previous teams synthesized pins from hydroxyapatite, a major component in human and animal bones. Eva Frederick, Science | AAAS, 21 Nov. 2019 But, reports Wudan Yan at The New York Times, the dragonfish enamel is studded with tiny crystals made of hydroxyapatite, just 5-to-20-nanometers in diameter. Jason Daley, Smithsonian, 6 June 2019 See More Word History
First Known Use
1912, in the meaning defined above
Medical Definition
hydroxyapatite
noun
hy·droxy·ap·a·tite hī-ˌdräk-sē-ˈap-ə-ˌtīt
variants or hydroxylapatite
-sə-ˈlap-ə-ˌtīt
: a complex phosphate of calcium Ca5(PO4)3OH that occurs as a mineral and is the chief structural element of vertebrate bone