Crystal

Merriam-Webster Online Dictionary
crystal (noun)
1.
quartz that is transparent or nearly so and that is either colorless or only slightly tinged
2.
something resembling crystal in transparency and colorlessness
3.
a body that is formed by the solidification of a chemical element, a compound, or a mixture and has a regularly repeating internal arrangement of its atoms and often external plane faces
4.
a clear colorless glass of superior quality , also objects or ware of such glass
5.
the glass or transparent plastic cover over a watch or clock dialect
6.
a material used in electronics as a frequency-determining element or for rectification - crystalline
7.
- ice , broadly methamphetamine in any form when used illicitly
crystal (adjective)
1.
consisting of or resembling crystal - clear lucid
2.
relating to or using a crystal - a crystal radio receiver
Crystal (geographical name)
city Minnesota of Minneapolis 22,698 - SE N pop