Alluvion
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
That increase of the earth on a shore or bank of a river by the force of the water, as by a current or by waves, which is so gradual that no one can judge how much is added at each moment of time.
Inst. 1. 2, tit. 1, § 20; 3 Barn. & C. 91; Code Civil Annote, note 556.
See "Accretion;" "Reliction."