The Collaborative International Dictionary
Pug piling
Piling \Pil"ing\, n. [See Pile a stake.] A series of piles; piles considered collectively; as, the piling of a bridge.
Pug piling, sheet piles connected together at the edges by dovetailed tongues and grooves.
Sheet piling, a series of piles made of planks or half logs driven edge to edge, -- used to form the walls of cofferdams, etc.