‖n. pl. [ F. ] (Geol.) Local oscillations in level observed in the case of some lakes, as Lake Geneva. [ 1913 Webster ]

n. [ Ar seyid prince. ] A descendant of Mohammed through his daughter Fatima and nephew Ali. [ 1913 Webster ]

a. Of or pertaining to Seidlitz, a village in Bohemia. [ Written also Sedlitz. ] [ 1913 Webster ]

Seidlitz powders, effervescing salts, consisting of two separate powders, one of which contains forty grains of sodium bicarbonate mixed with two drachms of Rochell&unr_; salt (tartrate of potassium and sodium) and the other contains thirty-five grains of tartaric acid. The powders are mixed in water, and drunk while effervescing, as a mild cathartic; -- so called from the resemblance to the natural water of Seidlitz. Called also Rochelle powders. --
Seidlitz water, a natural water from Seidlitz, containing magnesium, sodium, calcium, and potassium sulphates, with calcium carbonate and a little magnesium chloride. It is used as an aperient. [ 1913 Webster ]

obs. imp. sing. of See. Saw. Chaucer. [ 1913 Webster ]

a. [ F., fr. seigneur. See Seignior. ] 1. Of or pertaining to the lord of a manor; manorial. Sir W. Temple. [ 1913 Webster ]

2. Vested with large powers; independent. [ 1913 Webster ]

n. [ OF. seignor, F. seigneur, cf. It. signore, Sp. señor from an objective case of L. senier elder. See Senior. ] 1. A lord; the lord of a manor. [ 1913 Webster ]

2. A title of honor or of address in the South of Europe, corresponding to Sir or Mr. in English. [ 1913 Webster ]

Grand Seignior, the sultan of Turkey. [ 1913 Webster ]

n. [ F. seigneuriage, OF. seignorage. ] 1. Something claimed or taken by virtue of sovereign prerogative; specifically, a charge or toll deducted from bullion brought to a mint to be coined; the difference between the cost of a mass of bullion and the value as money of the pieces coined from it. [ 1913 Webster ]

If government, however, throws the expense of coinage, as is reasonable, upon the holders, by making a charge to cover the expense (which is done by giving back rather less in coin than has been received in bullion, and is called “levying a seigniorage”), the coin will rise to the extent of the seigniorage above the value of the bullion. J. S. Mill. [ 1913 Webster ]

2. A share of the receipts of a business taken in payment for the use of a right, as a copyright or a patent. [ 1913 Webster ]

a. Of or pertaining to a seignior; seigneurial. “Kingly or seignioral patronage.” Burke. [ 1913 Webster ]

n. The territory or authority of a seignior, or lord. Milman. [ 1913 Webster ]

a. Same as Seigneurial. [ 1913 Webster ]