seed vessel having hooks or prickles

rough projection left on a workpiece after drilling or cutting

United States politician who served as vice president under Jefferson; he mortally wounded his political rival Alexander Hamilton in a duel and fled south (1756-1836)

rotary file for smoothing rough edges left on a workpiece

small bit used in dentistry or surgery

remove the burrs from

a high speed drill that dentists use to cut into teeth

any of several plants of the genus Bidens having yellow flowers and prickly fruits that cling to fur and clothing

medium to large deciduous oak of central and eastern North America with ovoid acorns deeply immersed in large fringed cups; yields tough close-grained wood

having a head of straight hair cut very short (hence bristly)

large attractive palmlike evergreen cycad of New South Wales

having or covered with protective barbs or quills or spines or thorns or setae etc.

any of several fishes having rigid flattened spines

United States psychologist and a leading proponent of behaviorism (1904-1990)

United States physician who specialized in diseases of the intestines; he was the first to describe regional ileitis which is now known as Crohn's disease (1884-1983)

a flour tortilla folded around a filling

resembling a burr; especially in being prickly

small donkey used as a pack animal

long-eared deer of western North America with two-pronged antlers

United States writer noted for his works portraying the life of drug addicts (1914-1997)

United States inventor who patented the first practical adding machine (1855-1898)

United States novelist and author of the Tarzan stories (1875-1950)

a hole made by an animal, usually for shelter

move through by or as by digging

having or covered with protective barbs or quills or spines or thorns or setae etc.