allseed noun5 •Any of several plants, not closely related, that produce many seeds. •allseed flax (Radiola linoides) •fourleaf allseed (Polycarpon tetraphyllum) •knotweed (Polygonum spp.) •many-seeded goosefoot (Lipandra polysperma, syn. Chenopodium polyspermum) formsallseeds
