(Mech.) A form of impulse turbine or water wheel, consisting of a row of double cup-shaped buckets arranged round the rim of a wheel and actuated by one or more jets of water playing into the cups at high velocity. [ Webster 1913 Suppl. ]

n. [ It. pesto, pounded, from pestare to pound, crush, fr. LL. pistare, fr. pinsere. See also pestle. ] (Cookery) A sauce used in Italian cuisine, typically made by blending olive oil, basil, garlic, pine nuts, and grated parmesan cheese; it is served hot or cold over pasta, meat, or fish. Where pine nuts are expensive, sunflower seeds are sometimes substituted. [ PJC ]