Quiz: Remember the definition of mal de mer?


[muh-lib-duh-nahyt] /məˈlɪb dəˌnaɪt/
a soft, graphitelike mineral, molybdenum sulfide, MoS 2 , occurring in foliated masses or scales: the principal ore of molybdenum.
1790-1800; obsolete molybden(a) molybdenum + -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for molybdenite
  • molybdenite could also offer advantages for making higher-performance flexible solar cells and light-emitting diodes for displays.
  • molybdenite is the crystalline sulfide of molybdenum and the principal mineral from which molybdenum metal is extracted.
  • Molybdenum does not occur natively, but is obtained principally from molybdenite.
  • They also found the element in gadolinite and molybdenite.
  • Almost all molybdenum is gotten from low grade deposits of another mineral called molybdenite.
  • The vein does not expose molybdenite mineralization.
  • Select all granitic units that contain traces of molybdenite or molybdenite prospects.
  • Hand samples from small occurrences of galena and molybdenite were collected in the same area.
British Dictionary definitions for molybdenite


a soft grey mineral consisting of molybdenum sulphide in hexagonal crystalline form with rhenium as an impurity: the main source of molybdenum and rhenium. Formula: MoS2
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
molybdenite in Science
A soft, lead-gray hexagonal mineral that is the principal ore of molybdenum. It occurs as sheetlike masses in pegmatites and in areas where contact metamorphism has taken place. Chemical formula: MoS2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Article for molybdenite

the most important mineral source of molybdenum, molybdenum disulfide (MoS2). Molybdenite crystals have the same hexagonal symmetry as those of tungstenite (tungsten disulfide). Both have layered structures and similar physical properties; the chief difference is the higher specific gravity of tungstenite. For detailed physical properties, see sulfide mineral (table)

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

Word of the Day

Difficulty index for molybdenite

Few English speakers likely know this word

Word Value for molybdenite

Scrabble Words With Friends

Nearby words for molybdenite