umbilical

Etymology

Formed from Latin umbilicus (“navel”) + the suffix -al; surface analysis, umbilic- + -al.

adj

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

noun

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

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