Weed

weed
(Science: botany) Any plant that is growing in a place where a human wants a different kindof plant or no plants at all.
Any plant that crowds out cultivated plants.Clear of weeds; weed the garden.Plants that are considered a nuisance to man because they compete for resources in the same local environment as the crops we intend to grow for our own species. The weed may actually indirectly helping the crop by diverting pathogens that may otherwise.