Source : Webster's Revised Unabridged Dictionary (1913)

Glioma \Gli*o"ma\, n. [NL., fr. Gr. ? glue + -oma.] (Med.)
   A tumor springing from the neuroglia or connective tissue of
   the brain, spinal cord, or other portions of the nervous
   system.

Source : WordNet®

glioma
     n : a tumor of the brain consisting of neuroglia
     [also: {gliomata} (pl)]