callus(redirected from external callus)
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a thickening of the horny layer of the skin: You may have to go to a doctor to get that callus removed.
Not to be confused with:
callous – unfeeling; emotionally hardened: She was so callous that she didn’t shed a tear when her husband died.
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
n. pl. cal·lus·es
a. A localized thickening and enlargement of the horny layer of the skin. Also called callosity.
b. The hard bony tissue that develops around the ends of a fractured bone during healing.
a. Undifferentiated tissue that develops on or around an injured or cut plant surface or in tissue culture.
b. The hardened, sometimes sharp base of the spikelet of certain grasses.
intr.v. cal·lused, cal·lus·ing, cal·lus·es
To form or develop such hardened tissue. See Usage Note at callous.
[Latin, masculine of callum.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n, pl -luses
1. (Pathology) Also called: callosity an area of skin that is hard or thick, esp on the palm of the hand or sole of the foot, as from continual friction or pressure
2. (Pathology) an area of bony tissue formed during the healing of a fractured bone
3. (Botany) botany
a. a mass of hard protective tissue produced in woody plants at the site of an injury
b. an accumulation of callose in the sieve tubes
4. (Geological Science) biotechnology a mass of undifferentiated cells produced as the first stage in tissue culture
(Botany) to produce or cause to produce a callus
[C16: from Latin, variant of callum hardened skin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n., pl. -lus•es, n.
a. a hardened or thickened part of the skin; callosity.
b. a new growth of osseous matter at the ends of a fractured bone, serving to unite them.
2. Also, callose. the tissue that forms over the wounds of plants, protecting the inner tissues and causing healing.v.i.
3. to form a callus.v.t.
4. to produce a callus or calluses on.
[1555–65; < Latin]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
An area of the skin that has become hardened and thick, usually because of prolonged pressure or rubbing.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Past participle: callused
Collins English Verb Tables © HarperCollins Publishers 2011
The healing tissue produced by plants to cover a wound resulting from a cut or other physical damage.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
Switch to new thesaurus
|Noun||1.||callus - an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)|
hardening - abnormal hardening or thickening of tissue
|2.||callus - bony tissue formed during the healing of a fractured bone|
chestnut - a small horny callus on the inner surface of a horse's leg
|3.||callus - (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid|
|Verb||1.||callus - cause a callus to form on; "The long march had callused his feet"|
|2.||callus - form a callus or calluses; "His foot callused"|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
n. callo, callosidad.
English-Spanish Medical Dictionary © Farlex 2012
callusn (pl -luses) callo, (thin) callosidad f
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.