n. (Min.) Alum stone. [ 1913 Webster ]
n. [ F. alun alum + -gen. ] (Min.) A white fibrous mineral frequently found on the walls of mines and quarries, chiefly hydrous sulphate of alumina; -- also called feather alum, and hair salt. [ 1913 Webster ]
n. an apparatus containing compressed air or other oxygen-gas mixture, permitting a person to breathe under water; -- also called a
‖n. [ F. ] (Geol.) A series of strata, of the Middle Tertiary period, of France, abounding in shells, and used by Lyell as the type of his Miocene subdivision. [ 1913 Webster ]
‖n. [ Sp. media luna half-moon. ] (Zool.) See Half-moon. [ 1913 Webster ]
n. (Zool.) An East Indian civet (Viverra tangalunga). [ 1913 Webster ]