Definition of "cementum" [cementum]

• A bonelike substance covering the root of a tooth. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Lieberman looked at the growth patterns of a bonelike tissue called cementum, which is continuously deposited around the roots of mammalian teeth."
• "Like all mammals, we have a cycle of formation of rings around the tooth root called cementum annuli that form annually."
• "The volcanic ash and pulverized brick additives which were added to the burnt lime to obtain a hydraulic binder were later referred to as cementum, cimentum, cäment and cement."