Mohs' scale
/məʊz/noun
- a scale of hardness used in classifying minerals. It runs from 1 to 10 using a series of reference minerals, and position on the scale depends on ability to scratch minerals rated lower.（测量矿物硬度的）莫氏硬度标。
词源
late 19th cent.: named after Friedrich Mohs （1773-1839）, German mineralogist.