Definition of Froude number in English:

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Froude number

Pronunciation: /ˈfroud ˌnəmbər/


A dimensionless number used in hydrodynamics to indicate how well a particular model works in relation to a real system.
Example sentences
  • To this day, Froude numbers are used in boat design, and if you look at any boat-built-to-go-fast, from the racing shell to an America's Cup yacht, they all have the same long, sleek shape.’
  • In that article I talked about ratios of length, width and depth; I talked about wave drag and Froude numbers; I used lots of boat analogies (if none of that rings a bell you need to dig your last issue out and read it before going on here).
  • Locomotion velocity, usually expressed as absolute distance per second, might be more appropriately measured in body lengths per second, or possibly defined as the nondimensional Froude number.


Mid 19th century: named after William Froude (1810–79), English civil engineer.

For editors and proofreaders

Syllabification: Froude num·ber

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