The Collaborative International Dictionary
Teasel \Tea"sel\, n. [OE. tesel, AS. t[=ae]sel, t[=ae]sl, the fuller's herb. See Tease.] [Written also tassel, tazel, teasle, teazel, and teazle.]
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(Bot.) A plant of the genus Dipsacus, of which one species ( Dipsacus 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 Dipsacus sylvestris.
A bur of this plant.
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Any contrivance intended as a substitute for teasels in dressing cloth.
Teasel frame, a frame or set of iron bars in which teasel heads are fixed for raising the nap on woolen cloth.
Wiktionary
n. (obsolete form of teasel English)