A plant of the genus Dipsacus, of which one species (D. fullonum) bears a large flower head covered with stiff, prickly, hooked bracts. This flower head, when dried, is used for raising a nap on woolen cloth.
- Any of several plants of the genus Dipsacus, native to the Old World, having flower heads surrounded by spiny bracts.
- The bristly flower head of D. sativus, used to produce a napped surface on wool and other fabrics.
- A wire device used to produce a napped surface.
- To produce a napped surface on (a fabric).