Roberval's balance

noun Ro·ber·val's balance \ˈrōbə(r)ˌvȯlz-\

Definition of Roberval's balance

  1. :  a balance in which the pans are fixed to the prolonged vertical sides of a jointed parallelogram whose two other sides are pivoted in their midpoints to a vertical post

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Origin and Etymology of roberval's balance

after Gilles Personne de Roberval †1675 French mathematician

Seen and Heard

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a trip made at another's expense

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