spinel
/spɪˈnɛl/ noun
Forms spinels spinelle
- noun (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.
- noun (solid state chemistry) Any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.
- noun (obsolete) Spindle; the amount of yarn that fits on a spindle.
Etymology
French spinelle, perhaps from Latin spina (“a thorn, a prickle”), in allusion to its pointed crystals.
From Middle English spinel, from Old English spinel (“spindle; the amount of yard on a spindle”), whence also the usual modern form, English spindle.
Webster’s 1913
- noun A mineral occuring in octahedrons of great hardness and various colors, as red, green, blue, brown, and black, the red variety being the gem spinel ruby. It consist essentially of alumina and magnesia, but commonly contains iron and sometimes also chromium.
- noun Bleached yarn in making the linen tape called inkle; unwrought inkle. Knight.
Etymology [F. spinelle, or LL. spinellus, perhaps from L. spina a thorn, a prickle, in allusion to its pointed crystals.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “spinel”, CC BY-SA 4.0. Details