ossicle

US /ˈɑːsɪkl/
UK /ˈɑːsɪkl/
"ossicle" picture
1.

a very small bone, especially one of the three bones of the middle ear (malleus, incus, and stapes)

:
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The smallest bone in the human body is the stapes, an ossicle in the ear.
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Damage to these tiny ossicles can lead to hearing loss.
:
boneletossiculum