D defs.my
Entry 2 senses Webster, 1913

Pipelaying

· Pipe·lay·ing · IPA
01 n. The laying of conducting pipes underground, as for water, gas, etc.
  1. 1.
    The laying of conducting pipes underground, as for water, gas, etc.
  2. 2.
    The act or method of making combinations for personal advantage secretly or slyly; -- in this sense, usually written as one word.(Polit. Cant) [U.S.]