Definition of “spinel”
noun:
-
Any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
Any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
Bleached yarn in making the linen tape called inkle; unwrought inkle.
from Wiktionary, Creative Commons Attribution/Share-Alike License
-