(lāk) noun
1. A considerable inland body of water or natural enclosed basin serving to drain the surrounding country. ♦ Collateral adjective: lacustrine.
2. A small artificial pond; also, a pool of any liquid: a lake of wine. [Fusion of OE lac a stream, pool and OF lac a basin, pond, lake <L lacus. Akin to LEACH, LEAK.]

(lāk) noun
1. A deep red pigment made by combining some animal (as cochineal) or vegetable (as madder) coloring matter with a metallic oxide, usually that of aluminum or tin.
2. The color of this pigment.
3. Any insoluble metallic compound yielding variously colored pigments by the chemical interaction of mordant and dye. [Var. of LAC¹]

(lāk) v.t. laked, lak·ing
1. To separate the hemoglobin from the red corpuscles of (blood).
2. To make red in color, as the blood. [<LAKE² (from the red color of the corpuscles)]
—lak′ing noun

(lāk), Simon,
1866–1945, U.S. engineer, naval architect and submarine builder.