weight-saving

weight-saving (uncountable)

1. An intentional reduction in the weight of an object.
   • 1979 August, Graham Burtenshaw, Michael S. Welch, “O.V.S Bulleid's SR loco-hauled coaches - 1”, in Railway World, page 396:

     Because of attention to weight-saving No 5751 weighed much the same as the shorter Maunsell coaches.

• weight saving, weightsaving