an ectodermally covered mesenchymal swelling lying medial to the olfactory placode or pit in the embryo; the nasal tip and philtrum of the lip develop from it. Synonym(s): medial nasal fold, medial nasal process
me·di·al na·sal prom·i·nence
, medial nasal process (mēdē-ăl nāzăl promi-nĕns, proses) Ectodermally covered mesenchymal swelling lying medial to the olfactory placode or pit in embryos.