Someone who spins (who twists fibers into threads) WordNet 3.0 & Open English WordNet

A spinner or numeric updown is a graphical control element with which a user may adjust a value in an adjoining text box by either clicking on an up or down arrow, by pressing an arrow key down or moving mouse wheel, causing the value in the text box to increase or decrease. Wikipedia

A graphical widget in a GUI Wikipedia Disambiguation

Someone who spins (who twists fibers into threads). OmegaWiki

An input control for entering a number, with accompanying arrowed buttons that increase or decrease the value. Wiktionary

Computing: Input control for entering a number with accompanying arrowed buttons. Wiktionary (translation)

Someone whose occupation was spinning thread. Wiktionary