in·​ter·​den·​tal ˌin-tər-ˈden-tᵊl How to pronounce interdental (audio)
: situated or intended for use between the teeth
: formed with the tip of the tongue between the upper and lower front teeth
interdentally adverb

Examples of interdental in a Sentence

Recent Examples on the Web These brushes also come with a smaller, interdental brush for wire cleaning--an important step in braces hygiene. Sarah Bradley, Verywell Health, 23 Feb. 2023 In 2017, Waterpik became the first-ever interdental cleaner brand to gain a seal of approval from the ADA for the product’s ability to help remove up to 99 percent of plaque. Nicole Saunders, NBC News, 14 Oct. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'interdental.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

circa 1874, in the meaning defined at sense 1

Time Traveler
The first known use of interdental was circa 1874

Dictionary Entries Near interdental

Cite this Entry

“Interdental.” Dictionary, Merriam-Webster, Accessed 15 Jun. 2024.

Medical Definition


in·​ter·​den·​tal ˌint-ər-ˈdent-ᵊl How to pronounce interdental (audio)
: situated or intended for use between the teeth
floss the interdental spaces
interdentally adverb
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