TROLL (4)

Troll, n. 1. 1. The act of moving round; routine; repetition. Burke.
2. 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. 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.