[bur-dok] 
| a composite plant of the genus Arctium, esp. A. lappa, a coarse, broad-leaved weed bearing prickly heads of burs that stick to the clothing. |
| bur·dock (bûr'dŏk') n. Any of several weedy, chiefly biennial plants of the genus Arctium in the composite family, having pink or purplish flower heads surrounded by prickly bracts and forming a bur in fruit. [bur1 + dock4.] |
dɒk