Callus vs. Callous

by Jennifer on June 5, 2011

Callus (noun) – Hard thickened area on the skin or a thickening of area on skin.  A callus could form around a break in a bone.

Callous (adjective) – Thickened or hardened.  It can also mean feeling no emotion.

Callously is an adverb.

Callousness is a noun.

Both callus and callous can be used as verbs.


bony callus
external callus
inner callus
periosteal callus formation


callous attitude

Send in the words you have for callus and callous.



{ 4 comments… read them below or add one }

Kay June 7, 2011 at 8:44 am

I do get confused on the 2 sometimes. I would be like more word examples if you have them.

kat June 12, 2011 at 7:56 pm

Is it periosteal callus formation or periosteal callous formation?

Jennifer June 12, 2011 at 7:59 pm

It’s periosteal callus formation. I will add it to the list. Thank you for the good question.

Jennifer February 17, 2014 at 4:17 pm

medial malleolus fracture with minimal callous formation present laterally

Or would this be callus formation?

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