wasteweir
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Wasteweir — Waste weir , n. An overfall, or weir, for the escape, or overflow, of superfluous water from a canal, reservoir, pond, or the like. [1913 Webster] … The Collaborative International Dictionary of English
wasteweir — noun a channel that carries excess water over or around a dam or other obstruction • Syn: ↑spillway, ↑spill • Derivationally related forms: ↑spill (for: ↑spill) • Hypernyms: ↑ … Useful english dictionary