n. the type genus of the Danaidae, including the monarch butterfly, Danaus plexippus.
Syn. -- genus Danaus. [ WordNet 1.5 ]

n. a small natural family of usually tropical butterflies, including the monarch butterflies.
Syn. -- family Danaidae. [ WordNet 1.5 ]

n. [ From the mythical Danaides, who were condemned to fill with water a vessel full of holes. ] (Mach.) A water wheel having a vertical axis, and an inner and outer tapering shell, between which are vanes or floats attached usually to both shells, but sometimes only to one. [ 1913 Webster ]

n. [ Named after J. Freeman Dana. ] (Min.) A cobaltiferous variety of arsenopyrite. [ 1913 Webster ]

n. [ Named after James Dwight Dana. ] (Min.) A mineral occuring in octahedral crystals, also massive, of a reddish color. It is a silicate of iron, zinc manganese, and glucinum, containing sulphur. [ 1913 Webster ]