repreˈcipitate,v.|riː-| [re- 5 a.] trans. To precipitate (a substance) again. 1842Parnell Chem.Anal. (1845) 293 It is soluble in cold acetic and dilute nitric acids, and is reprecipitated by ammonia.1881Nature XXIV. 470/1 Bone earth dissolved in acid is reprecipitated by alkalies.