The Collaborative International Dictionary of English v.0.48:

Somatic \So*mat"ic\ (s[-o]*m[a^]t"[i^]k), a. [Gr. swmatiko`s,
   fr. sw^ma the body.]
   1. Of or pertaining to the body as a whole; corporeal; as,
      somatic death; somatic changes.
      [1913 Webster]

   2. Of or pertaining to the wall of the body; somatopleuric;
      parietal; as, the somatic stalk of the yolk sac of an
      embryo.
      [1913 Webster]

   Somatic death. See the Note under Death, n., 1.
      [1913 Webster]