umbilicus.
A navel.
Meaning & usage
A navel.
A umbilical cord.
A hilum.
A depression or opening in the center of the base of many spiral shells.
Either of the two apertures in the calamus of a feather.
A tube connecting an astronaut or spacecraft to the mothership, through which supplies and samples can be transferred.
One of the foci of an ellipse or other curve.
A point of a surface at which the curvatures of the normal sections are all equal to each other.
A sphere may be osculatory to the surface in every direction at an umbilicus.
An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled.
Where this word comes from
Etymology tree Proto-Indo-European *h₃nóbʰōlder. Latin umbilīcusbor. English umbilicus Borrowed from Latin umbilīcus (“navel”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.