The trophectoderm, or trophoblast, together with the vascular mesodermal layer underlying it. ... See: serosa. ... Origin: tropho-+ G. Derma, skin ... (05 Mar 2000) ... 
Type: Term Pronunciation: trof′ō-derm Definitions: 1. The trophectoderm, or trophoblast, together with the vascular mesodermal layer underlying it.
trophoderm 1. The growing, active part of the trophoblast in the placental region. 2. The trophectoderm, or trophoblast, together with the vascular mesodermal layer underlying it.