cal·​lus | \ ˈka-ləs How to pronounce callus (audio) \

Definition of callus

 (Entry 1 of 2)

1 : a thickening of or a hard thickened area on skin or bark
2 : a mass of exudate and connective tissue that forms around a break in a bone and is converted into bone in healing
3 : soft tissue that forms over a wounded or cut plant surface


callused; callusing; calluses

Definition of callus (Entry 2 of 2)

intransitive verb

: to form callus

transitive verb

: to cause callus to form on

Examples of callus in a Sentence

Recent Examples on the Web: Noun The permanent callus on my middle finger, that one’s all mine, from gripping pencils. Priscilla Totiyapungprasert, The Arizona Republic, 8 May 2022 In Teba Nagar, Shabana Khan’s husband Hakim Khan had been prescribed surgery by the district hospital to remove a painful callus on his foot. Supriya Sharma, Quartz, 15 Apr. 2022 Partial girdling of the stem interrupts the downward movement of carbohydrates and other compounds in the plant, which promotes the formation of callus tissue and roots at this point. Tim Johnson,, 19 Mar. 2022 Parthasarathy recommends steering clear of metal foot files or callus removers – or anything sharper than a pumice stone. Washington Post, 17 Dec. 2021 Cuts should be ¼ inch above a node to speed callus formation and our pruners and loppers must be sharp. Nan Sterman, San Diego Union-Tribune, 7 Aug. 2021 This process, known as healing, helps form a callus, preventing rot. Heather Arndt Anderson, Sunset Magazine, 11 Feb. 2020 One way to investigate the other trees is to check for wounding/callus tissue at the base of the tree. oregonlive, 24 July 2021 That was initially diagnosed as a callus and was treated with a cortisone injection. Evan Grant, Dallas News, 22 May 2021 Recent Examples on the Web: Verb If the patches are dry and callused, the fruits should store okay in your basement. Ellen Nibali,, 26 Sep. 2019 That seems an obvious goal for a hitter, of course, but with a baseball mind callused by a few long seasons someone like Semien didn’t become stuck in his ways, but more than willing to fix his faults. Shayna Rubin, The Mercury News, 21 Sep. 2019 Just as blisters are badges of honor for distance runners, callused fingers become a rite of passage for any climber. Jen Murphy, WSJ, 28 Nov. 2018 Kendall Jenner likes tiny fish chomping at her callused feet. Samantha Sasso,, 14 Mar. 2018 Over the years, the Iditarod Trail Sled Dog Race has left Lanier callused, frostbitten, broken and bruised. Tegan Hanlon, Anchorage Daily News, 5 Mar. 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'callus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of callus


1563, in the meaning defined at sense 1


1824, in the meaning defined at transitive sense

History and Etymology for callus



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Last Updated

20 May 2022

Cite this Entry

“Callus.” Dictionary, Merriam-Webster, Accessed 24 May. 2022.

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More Definitions for callus


cal·​lus | \ ˈka-ləs How to pronounce callus (audio) \
plural calluses

Kids Definition of callus

: a hard thickened area on the skin and especially on the hands and feet


cal·​lus | \ ˈkal-əs How to pronounce callus (audio) \

Medical Definition of callus

1 : a thickening of or a hard thickened area on skin
2 : a mass of exudate and connective tissue that forms around a break in a bone and is converted into bone in the healing of the break


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