results in development of results in development of mesoderm development axial mesoderm development The process whose specific outcome is the progression of the axial mesoderm over time, from its formation to the mature structure. The axial mesoderm includes the prechordal mesoderm and the chordamesoderm. It gives rise to the prechordal plate and to the notochord. GO:0048318 biological_process anatomical structure development axial mesoderm