Callus

n.	1.	(Med.) Same as Callosity
	2.	(Hort.) The new formation over the end of a cutting, before it puts out rootlets.

Noun	1.	callus - an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot) Synonyms: callosity
	2.	callus - bony tissue formed during the healing of a fractured bone
	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"

a small area of skin, usually on the foot, that has become thick and hard from rubbing or pressure.

Philistinism, armor, benign tumor, callosity, callousness, cancer, carcinoma, corn, cyst, excrescence, flintiness, formidable defenses, fungosity, fungus, growth, hard heart, hard shell, hardenedness, hardheartedness, hardness, hardness of heart, heart of stone, imperviousness, induration, insensitiveness, insensitivity, intumescence, inuredness, malignant growth, metastatic tumor, mole, morbid growth, neoplasm, nevus, nonmalignant tumor, obduracy, obdurateness, outgrowth, proud flesh, rhinoceros hide, sarcoma, stoniness, thick skin, tumor, verruca, wart, wen