The cytotrophoblast, deep inside, consists in an inner irregular layer of ovoid, single- nucleus cells. This is also where intensive mitotic activity takes place. In the periphery the syncytiotrophoblast forms a syncytium, i.e., a multi-nucleic layer without cell boundaries that arises from the fusion of cytotrophoblast cells.
Define Aryl group. Aryl group synonyms, Aryl group pronunciation, Aryl group translation, English dictionary definition of Aryl group. n. A compound containing benzene or another aromatic hydrocarbon, or a univalent group derived from such a compound by removal of a hydrogen atom attached...
Medical Definition of aromatic. 1  1: of, relating to, or having a smell or odor. 2  2of an organic compound : characterized by increased chemical stability resulting from the delocalization of electrons in a ring system (as benzene) containing usually multiple conjugated double bondsâcompare alicyclic, aliphatic.