1. a coarse-grained igneous rock composed almost entirely of the mineral olivine
Usage: geology

Examples

• The geologist identified the green rock sample as dunite.
• Dunite is commonly found in the Earth’s upper mantle.
• The mountain’s core consisted primarily of dunite and other ultramafic rocks.
• Mining operations extracted chromite from the dunite deposits.
• The dunite formation indicated ancient volcanic activity in the region.