The Collaborative International Dictionary
Fuller's weed
Fuller \Full"er\, n. [AS. fullere, fr. L. fullo. See Full, v. t.] One whose occupation is to full cloth.
Fuller's earth, a variety of clay, used in scouring and cleansing cloth, to imbibe grease.
Fuller's herb (Bot.), the soapwort ( Saponaria officinalis), formerly used to remove stains from cloth.
Fuller's thistle or Fuller's weed (Bot.), the teasel ( Dipsacus fullonum) whose burs are used by fullers in dressing cloth. See Teasel.