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单词 orbicular bone
释义

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orbicular bone
orbicular bone n. [after post-classical Latin os orbiculare (1666 or earlier)] Anatomy now rare or disused the lenticular process of the incus, esp. in the fetus.
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the world > life > the body > structural parts > bone or bones > skull > parts of skull > [noun] > bones of ear > others
os orbiculare1698
orbicular bone1706
tympanic1851
opisthotic1865
prootic1866
tympanal1875
otolith1890
tegmen tympani1890
1706 Phillips's New World of Words (new ed.) Orbicular Bone (in Anat.), one of the little Bones of the inner part of the Ear, which is fasten'd by a slender Ligament to the sides of that called Stapes.
1800 Philos. Trans. (Royal Soc.) 90 9 It is united by its long process to the orbicular bone, which is the smallest in the body.
1892 New Sydenham Soc. Lexicon Orbicular bone, a very minute bone of the middle ear, like to a grain of sand..; it is a separate bone in childhood, but by some is looked upon as an epiphysis of the incus.
extracted from orbicularadj.n.
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