pigweed

from WordNet (r) 3.0 (2006)

pigweed
    n 1: common weedy European plant introduced into North America;
         often used as a potherb [syn: {lamb's-quarters}, {pigweed},
         {wild spinach}, {Chenopodium album}]
    2: leaves sometimes used as potherbs; seeds used as cereal;
       southern United States to Central America; India and China
       [syn: {pigweed}, {Amaranthus hypochondriacus}]
    3: leaves collected from the wild [syn: {lamb's-quarter},
       {pigweed}, {wild spinach}]

from The Collaborative International Dictionary of English v.0.48

Pigweed \Pig"weed`\, n. (Bot.)
   A name of several annual weeds. See {Goosefoot}, and
   {Lamb's-quarters}.
   [1913 Webster]