callus

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callus

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.

cal·lus

(kăl′əs)

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.

2. Botany

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.

callus

(ˈkæləs)

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

cal•lus

(ˈkæl əs)

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]

cal·lus

(kăl′əs)

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.

callus

Past participle: callused
Gerund: callusing

Imperative
callus
callus

Present
I callus
you callus
he/she/it calluses
we callus
you callus
they callus

Preterite
I callused
you callused
he/she/it callused
we callused
you callused
they callused

Present Continuous
I am callusing
you are callusing
he/she/it is callusing
we are callusing
you are callusing
they are callusing

Present Perfect
I have callused
you have callused
he/she/it has callused
we have callused
you have callused
they have callused

Past Continuous
I was callusing
you were callusing
he/she/it was callusing
we were callusing
you were callusing
they were callusing

Past Perfect
I had callused
you had callused
he/she/it had callused
we had callused
you had callused
they had callused

Future
I will callus
you will callus
he/she/it will callus
we will callus
you will callus
they will callus

Future Perfect
I will have callused
you will have callused
he/she/it will have callused
we will have callused
you will have callused
they will have callused

Future Continuous
I will be callusing
you will be callusing
he/she/it will be callusing
we will be callusing
you will be callusing
they will be callusing

Present Perfect Continuous
I have been callusing
you have been callusing
he/she/it has been callusing
we have been callusing
you have been callusing
they have been callusing

Future Perfect Continuous
I will have been callusing
you will have been callusing
he/she/it will have been callusing
we will have been callusing
you will have been callusing
they will have been callusing

Past Perfect Continuous
I had been callusing
you had been callusing
he/she/it had been callusing
we had been callusing
you had been callusing
they had been callusing

Conditional
I would callus
you would callus
he/she/it would callus
we would callus
you would callus
they would callus

Past Conditional
I would have callused
you would have callused
he/she/it would have callused
we would have callused
you would have callused
they would have callused

Collins English Verb Tables © HarperCollins Publishers 2011

callus

The healing tissue produced by plants to cover a wound resulting from a cut or other physical damage.

ThesaurusAntonymsRelated WordsSynonymsLegend:

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) callosity hardening - abnormal hardening or thickening of tissue clavus, corn - a hard thickening of the skin (especially on the top or sides of the toes) caused by the pressure of ill-fitting shoes
	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 cicatrice, cicatrix, scar - a mark left (usually on the skin) by the healing of injured tissue
	3.	callus - (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid phytology, botany - the branch of biology that studies plants plant process, enation - a natural projection or outgrowth from a plant body or organ
Verb	1.	callus - cause a callus to form on; "The long march had callused his feet" harden, indurate - make hard or harder; "The cold hardened the butter"
	2.	callus - form a callus or calluses; "His foot callused" harden, indurate - become hard or harder; "The wax hardened"

Translations

Schwiele

callo

känsä

cal callosité calus cor

žulj

callo

タコ胼胝

eelt

мозоль

callus

n (Med) → Schwiele f; (of bone) → Kallus m, → Knochenschwiele f; (Bot) → Wundholz nt, → Kallus m

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

cal·lus

, corn

n. callo, callosidad.

callus

n (pl -luses) callo, (thin) callosidad f

Mentioned in ?

References in classic literature ?

`I'm troubled with calluses, Jim; getting old,' she sighed cheerfully.

View in context

His bare feet were pervaded by a dull warmth that quickly penetrated the thick calluses. He knew now the nature of the ship's distress.

View in context

Researchers found that calluses offer the foot protection while you're walking around, without compromising tactile sensitivity -- or the ability to feel the ground.

Why Your Foot Calluses Might Be Good for You

Generally, the calluses are obtained at high frequencies.

MULTIPLE SHOOT REGENERATION VIA INDIRECT ORGANOGENESIS FROM SHOOT TIP AND NODAL MERISTEM EXPLANTS OF CERATOPHYLLUM DEMERSUM L

For a maximized proliferation of regenerative calluses and adventitious shoots, it is necessary to consider besides the composition of the culture medium as point out by Tokuji & Kuriyama (2003) and Shen et al.

Induction of callus and adventitious shoots on epicotyl and hypocotyl segments of cumaru (Dipteryx odorata)

Ten subcultures later, the calluses were used for plant regeneration, which involved three stages: (a) germination of the somatic embryos and shoot formation; (b) shoot development and (c) rooting and seedling.

Genetic transformation of the Brazilian BR 451 maize variety by the Agrobacterium tumefaciens method/Transformacao genetica da variedade brasileira de milho BR 451 pelo metodo da Agrobacterium tumefaciens

Corns and calluses are thick, hardened layers of skin that develop when your skin tries to protect itself against friction and pressure.

Home remedies: corns and calluses

usitatissimum donor plant, calluses, and regenerants and morphological changes in calluses of control and experimental groups were documented to evaluate the somaclonal variation.

Case Study of Somaclonal Variation in Resistance Genes Mlo and Pme3 in Flaxseed (Linum usitatissimum L.) Induced by Nanoparticles

Cadmium effects in sunflower: Membrane permeability and changes in catalase and peroxidase activity in leaves and calluses. J.

In vitro Study of Interactive Effect of Cadmium and Salicylic Acid on Growth and Biochemical Parameters in Tetra and Hexaploid Wheat

Corns and calluses These are thickened areas of skin that develop in areas where the feet and toes rub against your shoes--if there are prominent areas on the foot due to bunions or hammertoes, these areas are particularly vulnerable.