Definition of callosity in English:

callosity

Syllabification: cal·los·i·ty
Pronunciation: /kəˈläsitē
 
/

noun (plural callosities)

technical
  • A thickened and hardened part of the skin; a callus.
    More example sentences
    • Because the heads bear distinguishing patches of rough skin, called callosities, a good overhead view allows scientists to recognize an individual whale, year after year.
    • The patterns are made up of rough, raised patches of skin called callosities.
    • He had wagered that she would be a Teutonic heavyweight with callosities growing on her forehead.

Origin

late Middle English: from French callosité, from Latin callositas, from callosus 'hard-skinned', from callum, callus 'hardened skin'.

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