One of the mysteries of the English language finally explained.
Of, relating to, or characteristic of the plant family Portulacaceae, which includes the purslanes.
Mid 19th century; earliest use found in William T. Brande (1788–1866), chemist. From scientific Latin Portulaca portulaca + -aceous, after scientific Latin Portulacaceae, family name. Compare French Portulacacées, plural noun.
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