(n.) A leguminous plant of the genus Lupinus, especially L. albus, the seeds of which have been used for food from ancient times. The common species of the Eastern United States is L. perennis. There are many species in California.
(n.) A very light porous volcanic scoria, usually of a gray color, the pores of which are capillary and parallel, giving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used, esp. in the form of powder, for smoothing and polishing. Called also pumice stone.