Source : Webster's Revised Unabridged Dictionary (1913)

Portulacaceous \Por`tu*la*ca"ceous\, a. (Bot.)
   Of or pertaining to a natural order of plants
   ({Portulacace[ae]}), of which Portulaca is the type, and
   which includes also the spring beauty ({Claytonia}) and other
   genera.

Source : WordNet®

Portulacaceae
     n : family of usually succulent herbs; cosmopolitan in
         distribution especially in Americas [syn: {family
         Portulacaceae}, {purslane family}]