portifluvium

portifluvium [CL porta+fluvius; cf. et. porta aquatica or fluvialis] , floodgate, sluice-gate. 1411 custus †portiflumiorum [MS: portifluviorum] ‥ ad cariandum maremium ‥ usque molendinum ‥ pro factura †porti flumiorum [l. portifluviorum] ejusdem (DL MinAc) Arch. Soc. Derb XI 139; ad reparanda ‥ et emendanda dicta †portiflumia [MS: portifluvia] Ib..