'Portulacaceous' definitions:
Definition of 'Portulacaceous'
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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.
[1913 Webster]
