oligodendroglia Syllabification: (ol·i·go·den·drog·li·a)Pronunciation: /ˌäligōdenˈdräglēə/Definition of oligodendroglia noun Anatomy oligodendrocytes collectively. Derivatives oligodendroglial adjective Origin: 1920s: from oligo- 'few' + dendro- 'branching' + a shortened form of neurogliaoligodendroglia in other Oxford dictionaries Definition of oligodendroglia in the British & World English dictionary