duricrust Syllabification: (dur·i·crust)Pronunciation: /ˈd(y)o͝oriˌkrəst/Definition of duricrust noun Geology a hard mineral crust formed at or near the surface of soil in semiarid regions by the evaporation of groundwater. Origin: 1920s: from Latin durus 'hard' + crustduricrust in other Oxford dictionaries Definition of duricrust in the British & World English dictionary