nounWord forms: plural ˈcalluses
the hard substance that forms at the break
in a fractured bone and serves
verb intransitive, verb transitive
to develop or cause to develop a callus
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'callus'L, var. of callum, hard skin