D defs.my
Entry 2 senses Webster, 1913

Pipelayer

· Pipe·lay·er · IPA
01 n. One who lays conducting pipes in the ground, as for water, gas, etc.
  1. 1.
    One who lays conducting pipes in the ground, as for water, gas, etc.
  2. 2.
    A politician who works in secret; -- in this sense, usually written as one word.(Polit. Cant) [U.S.]