microlith Syllabification: (mi·cro·lith)Pronunciation: /ˈmīkrəˌliTH/Definition of microlith noun Archaeology a minute shaped flint, typically part of a composite tool such as a spear. Derivatives microlithicPronunciation: /ˌmikrəˈliTHik/ adjective microlith in other Oxford dictionaries Definition of microlith in the British & World English dictionary