(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.

(informal, often slightly derogatory) Relatively large but unspecified in number.

(informal, often slightly derogatory) Occurring in a relatively large but unspecified position in a sequence.

(anatomy) The flexible structure connecting a foetus with the placenta; it transports nourishment to the foetus and removes waste.

Of, or relating to, the navel (umbilicus) or the umbilical cord. / (mathematics) Such that the curvatures of normal sections are all equal to each other.

(astronautics) A cord connecting an astronaut to a spacecraft, or a craft to ground control prior to launch, etc.

A deep brown colour.

Of a deep brown colour.

Of or relating to the Umayyad dynasty, which ruled the Umayyad caliphate from Damascus between 661 and 744 then from Harran until 750, and al-Andalus between 756 and 1031.

A member of the Umayyad dynasty.