‖n. [ L., purslane. ] (Bot.) A genus of polypetalous plants; also, any plant of the genus. [ 1913 Webster ]
☞ Portulaca oleracea is the common purslane. Portulaca grandiflora is a South American herb, widely cultivated for its showy crimson, scarlet, yellow, or white, ephemeral blossoms. [ 1913 Webster ]
a. (Bot.) Of or pertaining to a natural order of plants (