Definitions from Wiktionary ( )

▸ noun:  (countable) A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.
▸ noun:  (countable) A piece of glimmering, shining mineral resembling ice or glass.
▸ noun:  (uncountable) A fine type of glassware, or the material used to make it.
▸ noun:  (uncountable, slang) Crystal meth: methamphetamine hydrochloride.
▸ noun:  (obsolete, usually in the plural) a person's eye.
▸ noun:  The glass over the dial of a watch case.
▸ adjective:  Made of crystal.
▸ adjective:  Very clear.
▸ noun:  A female given name from English.
▸ noun:  A surname.
▸ noun:  A ghost town in Gunnison County, Colorado.
▸ noun:  A town in Maine.
▸ noun:  A city in Minnesota.
▸ noun:  A census-designated place in New Mexico.
▸ noun:  A city and town in North Dakota.
▸ noun:  A town in Wisconsin.

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