Open Dictionary
mouse here to listen, click to choose/add more
Location: USA
Source: Learn That Word
Profile URL:

Are you a native English speaker? How do you pronounce this word?

Thank you for contributing!
upload mp3 file or record now it's easy, promised!

{%type%} Definitions

WordNet 3.0Copyright Princeton University


Short "hint"

n. - (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid; Bony tissue formed during the healing of a fractured bone; An area of skin that is thick or hard from continual pressure or friction.

Usage examples (33)
  • Verb (used with object) : Heavy work callused his hands
  • New tissue, called callus, surrounds the fracture and replaces the dead bone.
  • A callus is a form of hyperkeratosis, or thickened skin, that creates a hard surface.
  • The wound will develop a scab known as a callus, which seals it off to disease and further moisture loss. for more
Tutoring comment
  • The doctor was "callous" (insensitive, cold in manner) when I showed her the painful "callus" (thick hard skin layer) on my finger.
add more
The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google,,, and YouTube,,,,, as well as the generous Creative Commons community.