ruby spinel

1. Gallium arsenide ultrared lighting transistor a purple variety of the ruby spinel.
   砷化镓红外发光晶体管一种紫色的红尖晶石。
2. A yellow or orange variety of ruby spinel.
   一种黄色或橙色的尖晶石。
3. A purple variety of the ruby spinel. Analysis on microstructure and electronic properties of boron-doped diamond single crystals
   一种紫色的红尖晶石。含硼金刚石单晶的结构与电学性能分析

noun

1. a spinel used as a gemstone (usually dark red)

   Synonym:    spinel ruby