cementum
noun
ce·men·tum
si-ˈmen-təm 
: a specialized bony layer of connective tissue covering the dentin of the part of a tooth normally within the gum see tooth illustration
Examples of cementum in a Sentence
Recent Examples on the Web
The root below the gums also has a covering, called cementum.
—
Mark Gurarie, Health, 21 June 2025
When this occurs, the softer cementum of your tooth's root is exposed and becomes vulnerable.
—Sherri Gordon, Health, 26 Mar. 2025
Biologists and forensic scientists count cementum rings (these microscopic structures encircle a tooth's root and vary in shade and thickness by season) in teeth for the same reason.
—Paul Smaglik, Discover Magazine, 7 Aug. 2024
For anchorage, the cementum, ligament and bone grip the tooth at its root portion that is buried under the gum.
—Samer Zaky, Discover Magazine, 10 May 2024
The ligament, a soft tissue that is about 0.2 millimeters wide (about the diameter of four hairs), attaches the cementum of the root on one end to the bone of the jaw on the other end.
—Samer Zaky, Discover Magazine, 10 May 2024
In the years sows are pregnant, their teeth will grow a thick cementum layer from gaining so much weight.
—Katie Hill, Outdoor Life, 28 Sep. 2023
Meanwhile, Matson’s boasts an extremely high level of accuracy in its cementum annuli analysis work.
—Katie Hill, Outdoor Life, 28 Sep. 2023
An annulus, or dark ring, is formed each winter between the cementum formed in spring and summer growth periods.
—Alan Clemons, Outdoor Life, 18 Mar. 2021
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Mark Gurarie, Health, 21 June 2025
When this occurs, the softer cementum of your tooth's root is exposed and becomes vulnerable.
—Sherri Gordon, Health, 26 Mar. 2025
Biologists and forensic scientists count cementum rings (these microscopic structures encircle a tooth's root and vary in shade and thickness by season) in teeth for the same reason.
—Paul Smaglik, Discover Magazine, 7 Aug. 2024
For anchorage, the cementum, ligament and bone grip the tooth at its root portion that is buried under the gum.
—Samer Zaky, Discover Magazine, 10 May 2024
The ligament, a soft tissue that is about 0.2 millimeters wide (about the diameter of four hairs), attaches the cementum of the root on one end to the bone of the jaw on the other end.
—Samer Zaky, Discover Magazine, 10 May 2024
In the years sows are pregnant, their teeth will grow a thick cementum layer from gaining so much weight.
—Katie Hill, Outdoor Life, 28 Sep. 2023
Meanwhile, Matson’s boasts an extremely high level of accuracy in its cementum annuli analysis work.
—Katie Hill, Outdoor Life, 28 Sep. 2023
An annulus, or dark ring, is formed each winter between the cementum formed in spring and summer growth periods.
—Alan Clemons, Outdoor Life, 18 Mar. 2021
Cite this Entry
“Cementum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cementum. Accessed 8 Jul. 2025.
Copy CitationKids Definition
cementum
noun
ce·men·tum
si-ˈment-əm
: an outside bony layer that covers the part of the tooth normally within the gum
Medical Definition
cementum
noun
ce·men·tum
si-ˈment-əm
Love words? Need even more definitions?
Merriam-Webster unabridged
Share