Definitions

1. noun

A hard, rocky layer of soil or sediment that forms on the surface of a previously deposited sedimentary layer, often resulting from weathering and erosion.

“The geologist studied the duricrust that had formed on the ancient riverbed.”

2. noun

A hard, weathered surface on the root or lower stem of a plant, especially a succulent.

“The cactus grew from the hard duricrust that had formed on its stem.”