umbilical

adjective

1. of or like an umbilicus, or navel, or an umbilical cord
2. situated at or near the navel; central to the abdomen
3. linked together by or as if by an umbilical cord

noun

1. a flexible, detachable cable serving as a tether or supplying oxygen, electric power, etc. as to an astronaut or aquanaut
2. any detachable cables, hoses, etc. connected to a rocket, etc. on its launch pad