BLUE, a. blu. One of the seven colors, into which the rays of light divide themselves, when refracted through a glass prism. There are various shades of blue, as sky-blue, or azure, Prussian blue, indigo blue, smalt blue, _c.
Prussian blue, a combination of the oxyd of iron with an acid called ferro-prussic.
BLU'E, v.t. To make blue; to dye of a blue color; to make blue by heating, as metals _c.
