noun
: a wide approach to the upstream side of an irrigation weir constructed so as to reduce to a minimum the effect of the momentum of the approaching water on the flow over the weir
noun
: a wide approach to the upstream side of an irrigation weir constructed so as to reduce to a minimum the effect of the momentum of the approaching water on the flow over the weir
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012