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, occurring in igneous and metamorphosed carbonate rocks, and valued as a gem. The red variety 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 spīna
- (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 The imported definitions may be significantly out of date, and any more recent senses may be completely missing.