PIGWEED

pigweed, Amaranthus hypochondriacus

(noun) leaves sometimes used as potherbs; seeds used as cereal; southern United States to Central America; India and China

Source: WordNet® 3.1

Etymology

Noun

pigweed (countable and uncountable, plural pigweeds)

Any of various weedy plants sometimes used as pig fodder

Amaranthus species

Chenopodium album, white goosefoot

Portulaca bicolor

Source: Wiktionary

Pig"weed`, n. (Bot.)

Definition: A name of several annual weeds. See Goosefoot, and Lamb's- quarters.

Source: Webster’s Unabridged Dictionary 1913 Edition