Any plant of the genus Lithospermum, herbs having a
fruit composed of four stony nutlets.
1. (Bot.) 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. Note: Small teasel is Dipsacus pilosus, wild teasel is D. sylvestris. 2. A bur of...