Last Updated
：2025/11/29
quadrate bone
Noun
Japanese Meaning
（解剖学）四角骨。大部分の脊椎動物（哺乳類以外）に認められ、下顎の基底部と頭蓋骨の間に位置する骨です。爬虫類や鳥類では、この骨が下顎と頭蓋骨を連結し、哺乳類ではその役割が中耳の一部（槌骨に相当する）によって担われます。
（ plural ）
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(anatomy) A bone between the base of the lower jaw and the skull in most vertebrates other than mammals. In reptiles and birds it articulates the lower jaw with the skull; in mammals it is represented by the incus.
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quadrate bone
In many reptiles, the quadrate bone plays a crucial role in articulating the lower jaw with the skull during feeding.
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In many reptiles, the quadrate bone plays a crucial role in articulating the lower jaw with the skull during feeding.
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