pistachio UK /pɪsˈtæʃi.əʊ/US /pɪsˈtæʃioʊ/ noun3 •The nutlike fruit of this tree.We topped ours with pistachio and mint, but this pudding is typically decorated with aromatic jasmine blossoms, a floral nod to summer’s end. — 2025 •A pale green colour, like that of a pistachio seed. •A deciduous tree (Pistacia vera) grown in parts of Asia for its drupaceous fruit. formspistachioes · pistachios