Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

linseed oil
     n : a drying oil extracted from flax seed and used in making
         such things as oil paints [syn: {flaxseed oil}]