• WordNet 3.6
    • n callosity devoid of passion or feeling; hardheartedness
    • n callosity an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)
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Webster's Revised Unabridged Dictionary
    • n Callosity A hard or thickened spot or protuberance; a hardening and thickening of the skin or bark of a part, eps. as a result of continued pressure or friction.
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Century Dictionary and Cyclopedia
    • n callosity The state or quality of being hardened or callous.
    • n callosity In a concrete sense, any thickened or hardened part on the surface of the human body or that of any animal, such as the hard and often somewhat bony lumps that arise in places exposed to constant pressure and friction, the cicatrized surfaces of old ulcers or wounds, etc., the natural cutaneous thickenings on the buttocks of gibbons and other monkeys, etc.
    • n callosity In botany, any part of a plant unusually hard.
    • n callosity In entomology, an elevated, rounded portion of the surface, generally smooth, and paler than the surrounding parts, appearing like a swelling.
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Chambers's Twentieth Century Dictionary
    • n Callosity a hard swelling on the skin
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Webster's Revised Unabridged Dictionary
L. callasitas,; cf. F. calosté,
Chambers's Twentieth Century Dictionary
L. callosus—callus, hard skin.


In literature:

Under the icy polish of his manner there were certain Puritan callosities caused by early straight-lacing.
"The Story of a Mine" by Bret Harte
I am old, and I am familiar with toil and poverty; idleness has not removed the callosities from my hands.
"The Honor of the Name" by Emile Gaboriau
The animal used to bite at his coronets and also the callosities above the knees and hocks until they bled, which they did quite easily.
"Diseases of the Horse's Foot" by Harry Caulton Reeks
Callosities on the inner sides of both the fore and the hind legs.
"Lay Sermons, Addresses and Reviews" by Thomas Henry Huxley
It had large callosities, and a scarcely visible tail, not an inch in length.
"The Mate of the Lily" by W. H. G. Kingston
Callus: a small callosity.
"Explanation of Terms Used in Entomology" by John. B. Smith
"Special Report on Diseases of the Horse" by United States Department of Agriculture
The callosities are the points on which it kneels down to receive its burden.
"Quadrupeds, What They Are and Where Found" by Mayne Reid
Head and lower jaw covered with callosities (the largest of which is called the bonnet and is set on top of the snout).
"Whales, Dolphins, and Porpoises of the Western North Atlantic" by Stephen Leatherwood
The governor struck his toe against it, on which toe a painful callosity existed.
"Antony Waymouth" by W.H.G. Kingston