The Collaborative International Dictionary of English v.0.48:

Plasm \Plasm\, n. [L. plasma anything formed or molded, that
   which is molded, Gr. ?, ?, from ? to form, mold: cf. F.
   plasme. Cf. Plasma.]
   1. A mold or matrix in which anything is cast or formed to a
      particular shape. [R.] --Woodward.
      [1913 Webster]

   2. (Biol.) Same as Plasma.
      [1913 Webster]

WordNet (r) 3.0 (2006):

plasm
    n 1: the protoplasm of the germ cells that contains chromosomes
         and genes [syn: germ plasm, plasm]
    2: the colorless watery fluid of the blood and lymph that
       contains no cells, but in which the blood cells
       (erythrocytes, leukocytes, and thrombocytes) are suspended
       [syn: plasma, plasm, blood plasma]