spinning jenny

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An early form of spinning machine having several spindles.

Century Dictionary and Cyclopedia

1. n. A spinning-machine, invented by James Hargreaves in 1767, which was the first to operate upon more than one thread. It has a series of vertical spindles. each of which is supplied with roving from a separate spool, and has a clasping and traversing mechanism by means of which the operator is enabled to clasp and draw out all the rovings simultaneously during the operation of twisting, and to feed the twisted threads to the spindles when winding on—the whole operation being almost exactly like hand-spinning, except that a large number of rovings are operated upon instead of a single one.

Wiktionary

1. n. an early spinning machine having multiple spools

GNU Webster's 1913

1. (Mach.) an engine or machine for spinning wool or cotton, by means of a large number of spindles revolving simultaneously.

WordNet 3.0

1. n. an early spinning machine with multiple spindles