Last Updated
：2025/11/23
pneumatic bone
（ plural ）
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(anatomy) Any bone, such as the mastoid process or those of the birds, that contains many hollow cells full of air
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pneumatic bone
The paleontologist carefully examined the fossilized pneumatic bone to determine whether it belonged to a flying ancestor or a terrestrial relative.
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The paleontologist carefully examined the fossilized pneumatic bone to determine whether it belonged to a flying ancestor or a terrestrial relative.
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