purslane UK /ˈpɜːslən/US /ˈpɝslən/noun 11forms 1 noun11 •Any of the family Portulacaceae (order Caryophyllales) of succulent plants. •common purslane or summer purslane (Portulaca oleracea), a widely-grown edible plant •moss-rose purslane, moss rose (Portulaca grandiflora) •Any of similar plants in other families in order Caryophyllales •winter purslane, miner's lettuce (Claytonia perfoliata) •pink purslane (Claytonia sibirica) •sea purslane •Halimione portulacoides •Honckenya peploides •shoreline purslane (Sesuvium portulacastrum) •purslane tree (Portulacaria afra) formspurslanes