Linseed \Lin"seed`\ (l[i^]n"s[=e]d`), n. [OE. lin flax + seed. See {Linen}.] (Bot.) The seeds of flax, from which linseed oil is obtained. [Written also {lintseed}.] {Linseed cake}, the solid mass or cake which remains when oil is expressed from flaxseed. {Linseed meal}, linseed cake reduced to powder. {Linseed oil}, oil obtained by pressure from flaxseed.