• synonyms


[bawr-aks, -uh ks, bohr-]
See more synonyms for borax on Thesaurus.com
noun, plural bo·rax·es, bo·ra·ces [bawr-uh-seez, bohr-] /ˈbɔr əˌsiz, ˈboʊr-/.
  1. a white, water-soluble powder or crystals, hydrated sodium borate, Na2B4O7⋅10H2O, occurring naturally or obtained from naturally occurring borates; tincal: used as a flux, cleansing agent, in the manufacture of glass, porcelain, and enamel, and in tanning.
Show More

Origin of borax1

1350–1400; < Medieval Latindialectal Arabic būraq < Middle Persian būrag; replacing Middle English boras < Middle French < Medieval Latin borax


[bawr-aks, -uh ks, bohr-]
  1. cheap, showy, poorly made merchandise, especially cheaply built furniture of an undistinguished or heterogeneous style.
Show More

Origin of borax2

An Americanism dating back to 1940–45; of uncertain origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for borax

Contemporary Examples

Historical Examples

British Dictionary definitions for borax


noun plural -raxes or -races (-rəˌsiːz)
  1. Also called: tincal a soluble readily fusible white mineral consisting of impure hydrated disodium tetraborate in monoclinic crystalline form, occurring in alkaline soils and salt deposits. Formula: Na 2 B 4 O 7 .10H 2 O
  2. pure disodium tetraborate
Show More

Word Origin

C14: from Old French boras, from Medieval Latin borax, from Arabic būraq, from Persian būrah
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

Word Origin and History for borax


late 14c., from Anglo-French boras, from Medieval Latin baurach, from Arabic buraq, applied by the Arabs to various substances used as fluxes, probably from Persian burah. Originally obtained in Europe from the bed of salt lakes in Tibet.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

borax in Medicine


(bôrăks′, -əks)
  1. Sodium borate.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

borax in Science


  1. A white, crystalline powder and mineral used as an antiseptic, as a cleansing agent, and in fusing metals and making heat-resistant glass. The mineral is an ore of boron and also occurs in yellowish, blue, or green varieties. Chemical formula: Na2B4O7·10H2O.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.