Relating to or derived from the three primary germ layers of the embryo: ectoderm, endoderm, and mesoderm. ... Origin: tri-+ G. Derma, skin ... (05 Mar 2000) ... 
(tri-dur´mik) derived from all three germ layers (ectoderm, endoderm, and mesoderm).
Type: Term Pronunciation: trī-der′mik Definitions: 1. Relating to or derived from the three primary germ layers of the embryo: ectoderm, endoderm, and mesoderm.
tridermic Relating to or derived from the three primary germ layers of the embryo: ectoderm, endoderm, and mesoderm.