1. The act of moving round; routine; repetition. Burke.

2. A song the parts of which are sung in succession; a catch; a round. Thence the catch and troll, while "Laughter, holding both his sides," sheds tears to song and ballad pathetic on the woes of married life. Prof. Wilson.

3. A trolley. Troll plate (Mach.), a rotative disk with spiral ribs or grooves, by which several pieces, as the jaws of a chuck, can be brought together or spread radially.

TROLLER
Troll"er, n.

Defn: One who trolls.

TROLLEY; TROLLY Trol"ley, Trol"ly, n. (a) A form of truck which can be tilted, for carrying railroad materials, or the like. [Eng.] (b) A narrow cart that is pushed by hand or drawn by an animal. [Eng.] (c) (Mach.) A truck from which the load is suspended in some kinds of cranes. (d) (Electric Railway) A truck which travels along the fixed conductors, and forms a means of connection between them and a railway car. Trolley line, (a) A trolley(e). (b) The path along which a trolley(e) runs. — Trolley car, a wheeled car powered by electricity drawn from a trolley, and thus constrained to follow the trolley lines.

TROLLEY CAR
Trol"ley car. (Elec.)

Defn: A motor car to which the current is conveyed by means of a trolley.

TROLLEY WIRE
Trolley wire.

Defn: A heavy conducting wire on which the trolley car runs and from which it receives the current.