|—n combining form|
|(in biology) indicating an embryonic cell or formative layer: mesoblast|
|[from Greek blastos bud]|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a stew of meat, vegetables, potatoes, etc.|
An immature, embryonic stage in the development of cells or tissues: erythroblast.