The Collaborative International Dictionary of English v.0.48:

-derm \-derm\ [See Derm, n.]
   A suffix or terminal formative, much used in anatomical
   terms, and signifying skin, integument, covering; as,
   blastoderm, ectoderm, etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Derm \Derm\, n. [Gr. de`rma, -atos, skin, fr. ? to skin, flay:
   cf. F. derme. See Tear, v. t.]
   1. The integument of animal; the skin.
      [1913 Webster]

   2. (Anat.) See Dermis.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dermis \Der"mis\, n. [NL. See Derm.] (Anat.)
   The deep sensitive layer of the skin beneath the scarfskin or
   epidermis; -- called also true skin, derm, derma,
   corium, cutis, and enderon. See Skin, and Illust. in
   Appendix.
   [1913 Webster]