最終更新日：2024/07/28

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(anatomy) navel / (botany) hilum / (zoology) A depression or opening in the center of the base of many spiral shells. / (zoology) Either of the two apertures in the calamus of a feather.

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umbilicus

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umbilicus

/ˌʌmˈbɪlɪkəs/

noun

(anatomy) navel / (botany) hilum / (zoology) A depression or opening in the center of the base of many spiral shells. / (zoology) Either of the two apertures in the calamus of a feather.