| calcium cyanamide |
a white powder used mainly as a fertilizer or weed killer; cyanamide. |
| charlock |
a weed with yellow flowers and a hairy stem, often found in grain fields; wild mustard. |
| cheat |
an annual brome grass, originally native to Europe but now a weed in wheat-growing regions worldwide; chess. [1/11 definitions] |
| chickweed |
a small, scrubby weed of the pink family with small leaves and white flowers. |
| cocklebur |
a coarse composite plant with rough, prickly burs, usu. considered a weed. [1/2 definitions] |
| coltsfoot |
a widespread perennial weed, named for the shape of its leaves. |
| corn cockle |
an annual flowering plant that bears pinkish flowers and poisonous seeds and is considered a weed. |
| couch grass |
a grass that has creeping rootstocks, by which it spreads rapidly, and is considered a troublesome weed; quack grass; quitch. |
| devil's paintbrush |
a common perennial weed found in Europe and North America that bears a cluster of orange-red flowers atop a leafless stalk. |
| henbit |
a spreading European weed, related to mint, that has opposite, toothed leaves and bears small white, pink, or purple flowers. |
| hoe |
to use a hoe on; cultivate or weed. [1/3 definitions] |
| Jerusalem oak |
a North American weed with lobed leaves and an odor like turpentine. |
| Johnson grass |
a coarse perennial grass grown for animal forage, but often growing as a troublesome weed. |
| lamb's-quarters |
(used with a sing. or pl. verb) an annual weed of the goosefoot family having mealy leaves and bearing clusters of small green flowers; pigweed. |
| mullein |
a weed that has coarse leaves covered by a thick, wooly down and bears spikes of densely clustered yellow flowers. [1/2 definitions] |
| Queen Anne's lace |
a common weed related to the carrot that bears large, lacy umbels of tiny white flowers. |
| ragweed |
a weed of the daisy family that produces abundant airborne pollen in the fall. |
| shepherd's-purse |
a weed that bears small white cross-shaped flowers and pods that resemble purses or pouches. |
| stinkweed |
any of various bad-smelling plants, such as the jimson weed or dog fennel. |
| stramonium |
a coarse, foul-smelling weed with trumpet-shaped white or lavender flowers, prickly fruit, and poisonous leaves; jimson weed. [2 definitions] |
| tansy |
any of several fragrant herbs bearing small round flower heads, esp. a poisonous weed with feathery leaves and bearing small yellow flower heads, often used medicinally or as an herb. |