n.
Pronunciation: m ə - ˌ d ə -l ō - ˌ blas- ' t ō -m ə
Function: noun
Inflected Form: plural -mas also -ma · ta \ -m ə -t ə \
Etymology: New Latin, from medulla + -o- + blast- + -oma
Date: 1925
: a malignant tumor of the central nervous system arising in the cerebellum especially in children