callus

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callus:

see corns and callusescorns and calluses,
thickenings of the outer layer of skin where there is irritation or constant pressure. Corns are cone-shaped with their points protruding into the dermis, or inner layer of skin. They usually have hard, shiny surfaces surrounded by red, painful areas.
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Callus

 

(1) Tissue formed in plants on the surface of a wound (cracks, taps, the bases of cuttings, and areas of concrescence of stock and scion). A callus promotes the healing of wounds. Consisting of thin-walled parenchymal cells, a callus develops when there is cell division of any living tissue of the plant (cambium or phloem) in the peripheral zone of the pith, lying next to the protoxylem. Adventitious roots and buds, particularly with grafting, often develop in the callus. (2) Corpus callosum, an accumulation of callóse that obstructs the sieve plate when the sieve tubes of the phloem age. Use of the term in this sense is obsolete.


Callus

 

a thickening of the horny layer of skin as a result of constant pressure or friction. Calluses usually appear on the palms, soles, and other parts of the body that are in constant contact with tough surfaces. The cracks formed on the surface of a callus may hinder one’s ability to work, and they can also be portals of entry for pyogenic microbes, resulting in such conditions as erysipelatous inflammations and phlegmons.

callus

[′kal·əs]
(botany)
A thickened callose deposit on sieve plates.
A hard tissue that forms over a damaged plant surface.
(medicine)
Hard, thick area on the surface of the skin.

callus

1. 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. an area of bony tissue formed during the healing of a fractured bone
3. 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. Biotechnology a mass of undifferentiated cells produced as the first stage in tissue culture
References in periodicals archive ?
For mild hyperkeratosis, emollients and keratolytics like salicylic acid, urea, benzoic acid, propylene glycol may help along with comfortable footwear to reduce callosities and blistering.
(2002) The impact of callosities on the magnitude and duration of plantar pressure in patients with diabetes mellitus.
In addition to the callosities, some of the whales--quite a few of them, I was noticing--had those scorings scattered across their, bodies.
Elytra with fine, short setae on narrow intervals and on subapical callosities (seen by tipping back specimen); pronotal lateral margins sinuately constricted at base; southern Mexico, Guatemala D.
Vertex with 2 (1 + 1) medial parallel rows of granules, flanked by 2 (1 + 1) large callosities. Antenna about 1.80 times as long as width of head across eyes.
planter aspect of first toe, head of first, third and fifth metatarsals, heel and dorsum of foot, avoiding callosities, corns and ulcers, for touch and tuning fork for vibration sense.
Body pale tinged reddish, except antennae, eyes, a small rounded spot on middle of each corium castaneous; head, legs, callosities of pronotum reddish; anterior margin of pronotum, tip of scutellum white; membrane of hemelytra-dull white.
One study, examining the effect of podiatrist care on callosities, found that the podiatrist group had a lower prevalence and reduced size of calluses compared with individuals only receiving written instructions for foot care (Ronnemaa et al.
The white patches, called callosities, are actually infested with light-coloured whale lice.
Discus and paranota with tubercles and longitudinal callosities. Hind margin of paranota rounded.
The Whale Caller is able to distinguish Sharisha from other whales: "he enjoys watching Sharisha in the broad smile that displays the baleen that looks like teeth" (128) and she has very specific callosities "distinctively shaped like the Three Sisters Hills of the Karoo (36).