adjective
- having a rough, jagged, or splintery surface or edge; breaking with an irregular fracture
Usage: geology/mineralogy: describes minerals or rocks that fracture unevenly; technical
Examples
- The hackly surface of the broken flint made it dangerous to handle.
- Geologists identified the mineral by its hackly fracture pattern.
- The stone had a hackly edge that could easily cut skin.
- When struck, the ore produced a hackly break rather than a clean split.