flumen

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
FLUMEN, civ. law. The name of a servitude which consists in the right of 
turning the rain water, gathered in a spout, on another's land., Ersk. Inst. 
B. 2, t. 9, n. 9. Vicat, ad vocem. See Stillicidium. 
    

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