different between crystal vs indicatrix

English

Alternative forms

• crystall (obsolete)
• chrystal (obsolete)

Etymology

From Middle English crystal, cristal, cri?stall, from Old English cristalla (“crystal”), a borrowing from Latin crystallum (“crystal, ice”) (later reinforced from Anglo-Norman cristall and Middle French cristal, from Latin crystallum), from Ancient Greek ?????????? (krústallos, “clear ice”), from ????? (krúos, “frost”), from the Proto-Indo-European *krus-, *kru- (“hard, hard outer surface, crust”).

Pronunciation

• enPR: kr?s?t?l, IPA^(key): /?k??st?l/

Noun

crystal (countable and uncountable, plural crystals)

1. (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.

   Synonym: grain

   Antonyms: amorphous, glass

2. (countable) A piece of glimmering, shining mineral resembling ice or glass.
3. (uncountable) A fine type of glassware, or the material used to make it.
4. (uncountable, slang) Crystal meth: methamphetamine hydrochloride.
5. The glass over the dial of a watch case.

Derived terms

Descendants

• ? Japanese: ????? (kurisutaru)

Translations

Adjective

crystal (not comparable)

1. Very clear.

   "Do I make myself clear?" / "Crystal."

References

• Douglas Harper (2001–2021) , “crystal”, in Online Etymology Dictionary

English

Noun

indicatrix (plural indicatrices)

1. (mathematics, crystallography) An ellipsoid whose three axes represent the refractive indices of an anisotropic crystal for light following different directions with respect to the crystal axes