- A relatively poorly differentiated glioma composed of young, immature, neoplastic cells of the astrocytic series, frequently arranged radially with short fibrils terminating on small blood vessel s. [astro- + G. blastos, germ, + -oma, tumor]
* * *as·tro·blas·to·ma .as-trə-(.)blas-'tō-mə n, pl -mas also -ma·ta -mət-ə an astrocytoma of moderate malignancy
* * *as·tro·blas·to·ma (as″tro-blas-toґmə) an astrocytoma of Grade II; its cells resemble astroblasts, with abundant cytoplasm and two or three nuclei.
Medical dictionary. 2011.