astrocytoma

[ăs′trō-sī-tōmə]
n. pl. as•tro•cy•to•mas
  1. A malignant tumor of nervous tissue composed of well-differentiated astrocytes.grade I astrocytoma
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.