Why was "tantrum" trending last week?


[noh-vak-yuh-lahyt] /noʊˈvæk yəˌlaɪt/
noun, Petrology
a very hard sedimentary rock, similar to chert, composed essentially of microcrystalline quartz.
1790-1800; < Latin novācul(a) a sharp knife, razor + -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for novaculite
  • These products are manufactured from novaculite, quartzite, and other microcrystalline quartz rock.
  • Manufacture of these properties and end uses such as rottenstone and products was from novaculite, quartzite, or novaculite.
  • One of the ridge-making formations is a cream to yellowish-white, fine-grained, siliceous rock called novaculite.
  • They quarried novaculite here, as raw material for stone tools.
  • Bedrock areas that include fractured chert-novaculite or limestone also are considered to be preferred drilling sites.
British Dictionary definitions for novaculite


a fine-grained dense hard rock containing quartz and feldspar: used as a whetstone
Word Origin
C18: from Latin novācula sharp knife, razor, from novāre to renew
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
Encyclopedia Article for novaculite

very dense, light-coloured, even-textured sedimentary rock, a bedded chert in which microcrystalline silica (silicon dioxide, SiO2) in the form of quartz predominates over silica in the form of chalcedony. Deposits of novaculite exhibit stratification. The name is applied chiefly to formations in Arkansas, Oklahoma, and Texas. See also chert and flint.

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

Word of the Day

Difficulty index for novaculite

Few English speakers likely know this word

Word Value for novaculite

Scrabble Words With Friends