conchoidal 的定义
Mineralogy.
- noting a shell-like fracture form produced on certain minerals by a blow.
更多conchoidal例句
- Very compact and fine-grained reddish granular quartz, with a glistening lustre, and flat conchoidal fracture.
- I am told conchoidal white lime-stone meets it on both the east and west sides.
- In the form of translucent fragments, with a highly conchoidal fracture, among the debris of the shores of Lake Pepin.
- At ordinary temperatures ebonite is hard and brittle and breaks with a well-marked conchoidal fracture.
- The fracture of this fossil is perfectly conchoidal, sometimes glossy, and sometimes dull on the surface.