* * *
me·so·blast 'mez-ə-.blast, 'mēz-, 'mēs-, 'mes- n the embryonic cells that give rise to mesoderm broadly MESODERM
* * *
meso·blast (mezґo-) (meґzo-blast″) [meso- + -blast] mesoderm, especially in the early undifferentiated stages. mesoblastic adjMedical dictionary. 2011.