A lot vs. Alot: 9 Grammatical Pitfalls


[yoo-lek-sahyt] /yuˈlɛk saɪt/
a mineral, hydrous sodium and calcium borate, NaCaB 5 O 9 ⋅8H 2 O, occurring in arid regions in the form of white acicular crystals: a major source of borax.
1865-70; named after George L. Ulex, German chemist; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for ulexite
  • ulexite is a borate mineral that naturally has properties of fiber optics.
ulexite in Science
  (y'lĭk-sīt', y-lěk'-)   
A white triclinic mineral that forms rounded, reniform (kidney-shaped) masses of very fine needle-shaped crystals. Ulexite has the unusual optical property of projecting an image of an object placed against a transverse section of it to the opposite surface. It is usually associated with borax deposits and is found in arid environments. Chemical formula: NaCaB5O9·8H2O.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Article for ulexite

borateborate mineral, NaCaB5O6(OmicronH)65H2O, that consists of hydrated sodium and calcium borate. Individual crystals are colourless and have a vitreous lustre, whereas the more common nodular, rounded, or lenslike crystal aggregates (often resembling cotton balls) are white and have a silky or satiny lustre. It is sometimes called "television rock" or "TV rock" for its fibre-optical properties.

Learn more about ulexite with a free trial on
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for ulexite

Few English speakers likely know this word

Word Value for ulexite

Scrabble Words With Friends

Nearby words for ulexite