What does "spinning" mean?

Spinning: from Spin. Spinning gland (Zoöl.), one of the glands which form the material for spinning the silk of silkworms and other larvæ. -- Spinning house, formerly a common name for a house of correction in England, the women confined therein being employed in spinning. -- Spinning jenny (Mach.), an engine or machine for spinning wool or cotton, by means of a large number of spindles revolving simultaneously. -- Spinning mite (Zoöl.), the red spider. -- Spinning wheel, a machine for spinning yarn or thread, in which a wheel drives a single spindle, and is itself driven by the hand, or by the foot acting on a treadle.