Dictionary.net

• The lifeless ingredients of protoplasm, as opp. to the living material.

1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.

• Material in a cell which is of lower quality than the true protoplasm. It is protoplasm undergoing retrograde metamorphosis, or nourishment not fully transformed into protoplasm. [Gr.]

1916 - Appleton's medical dictionary
By Smith Ely Jelliffe