Ossicle definitions

ŏs'ĭ-kəl
A small bone, especially one of the three bones of the middle ear.
noun
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A small bone or bonelike structure; esp., any of the three small bones in the tympanic cavity of the ear.
noun
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A small bone, especially one of the three bones of the middle ear.
noun
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A small bone, especially one of the three located in the middle ear (the incus, malleus, and stapes) that transmit sound vibrations from the eardrum to the inner ear.
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(anatomy) A small bone (bony structure), especially one of the three of the middle ear.

The incus is one of the three auditory ossicles.

noun
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(zoology) Bone-like joint or plate, especially:
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Origin of ossicle

Late 16th century from Latin ossiculum (“little bone, ossicle") from os (“bone").