umbilicus
n. 脐, 中心 [医] 脐
发音
词形变化
别名
释义与例句
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1.
A navel.
医学 -
2.
Umbilical cord
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3.
A hilum.
生物 植物学 -
4.
A depression or opening in the center of the base of many spiral shells.
生物 动物学 -
5.
Either of the two apertures in the calamus of a feather.
生物 动物学 -
6.
A tube connecting an astronaut or spacecraft to the mothership, through which supplies and samples can be transferred.
航空 商务 工程How about a 270 mile tether to an orbiting satellite? Oh, you'd like that, wouldn't you? Frank! Prepare to receive the umbilicus!
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7.
One of the foci of an ellipse or other curve.
废旧 数学 -
8.
A point of a surface at which the curvatures of the normal sections are all equal to each other.
数学A sphere may be osculatory to the surface in every direction at an umbilicus.
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9.
An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled.
历史
词汇关系
词源
Borrowed from Latin umbilīcus (“navel”).
来源：wiktionary