The American Heritage® Dictionary of the English Language, 4th Edition
n. Neuroglia consisting of cells similar to but smaller than astrocytes, found in the central nervous system and associated with the formation of myelin.
n. tissue (neuroglia) consisting of glial cells that are smaller than astrocytes and form the myelin sheath
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers
Word Usage
"In 1985 Dr. Marian Diamond of UC Berkeley and Scheibel found that Einstein's brain had four times more "oligodendroglia" - helper cells that speed neural communication-than the brains of 11 gifted people she also studied."