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|Noun||1.||oligodendria - tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers|
medullary sheath, myelin sheath - a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
glia, neuroglia - sustentacular tissue that surrounds and supports neurons in the central nervous system; glial and neural cells together compose the tissue of the central nervous system
oligodendrocyte - a cell of the oligodendroglia