Delta :: Delta (n.) A tract of land shaped like the letter delta (/), especially when the land is alluvial and inclosed between two or more mouths of a river; as, the delta of the Ganges, of the Nile, or of the Mississippi..
Deltafication :: Deltafication (n.) The formation of a delta or of deltas.
Deltaic :: Deltaic (a.) Relating to, or like, a delta..
Deltidium :: Deltidium (n.) The triangular space under the beak of many brachiopod shells.
Deltohedron :: Deltohedron (n.) A solid bounded by twelve quadrilateral faces. It is a hemihedral form of the isometric system, allied to the tetrahedron..
Deltoid :: Deltoid (a.) Shaped like the Greek / (delta); delta-shaped; triangular.