Danaide \Da"na*ide\ (d[=a]"n[.a]*[imac]d), 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]