umbilical cord

um•bil•i•cal cord n. [countable]

Developmental Biologya cordlike structure connecting the unborn baby or fetus with the mother's placenta during pregnancy, bringing nourishment from the mother and removing wastes.

umbil′ical cord′,

Anatomya cord or funicle connecting the embryo or fetus with the placenta of the mother and transporting nourishment from the mother and wastes from the fetus.
Electricity, Rocketryany electrical, fuel, or other cable or connection for servicing, operating, or testing equipment, as in a rocket or missile, that is disconnected from the equipment at completion.
[Aerospace Slang.]a strong lifeline by which an astronaut on a spacewalk is connected to the vehicle and supplied with air, a communication system, etc.

Collins Concise English Dictionary © HarperCollins Publishers::

umbilical cord n

the long flexible tubelike structure connecting a fetus with the placenta: it provides a means of metabolic interchange with the mother
any flexible cord, tube, or cable used to transfer information, power, oxygen, etc, as between an astronaut walking in space and his or her spacecraft or a deep-sea diver and his or her craft

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