Source : Webster's Revised Unabridged Dictionary (1913)

Ectoplasm \Ec"to*plasm\, n. [Ecto- + Gr. ? form.] (Biol.)
   (a) The outer transparent layer of protoplasm in a developing
       ovum.
   (b) The outer hyaline layer of protoplasm in a vegetable
       cell.
   (c) The ectosarc of protozoan.

Source : WordNet®

ectoplasm
     n 1: (spiritualism) a substance supposed to emanate from the body
          of the medium during a trance
     2: the outer granule-free layer of cytoplasm