Origin of spinelEarly Modern English spynel ; from Middle French spinelle ; from Italian spinella, diminutive of spina, thorn, spine ; from L: see spine
- A hard, variously colored mineral with composition MgAl2O4, having usually octahedral crystals and occurring in igneous and metamorphosed carbonate rocks. The red variety is valued as a gem and is sometimes confused with ruby.
- Any of a group of minerals that are oxides of magnesium, iron, zinc, manganese, or aluminum.
Origin of spinelItalian spinella, diminutive of spina, thorn (from its sharply pointed crystals), from Latin sp&imacron;na.
- (mineralogy) Any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.
- (solid state chemistry) Any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.
- Bleached yarn in making the linen tape called inkle; unwrought inkle.
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.