Borax is a white powder used, for example, in the making of glass and as a cleaning chemical.
borax in British English
(ˈbɔːræks)
nounWord forms: 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: Na2B4O7.10H2O
2.
pure disodium tetraborate
Word origin
C14: from Old French boras, from Medieval Latin borax, from Arabic būraq, from Persian būrah
borax in American English
(ˈbɔrˌæks)
noun
1.
sodium borate, a white, anhydrous, crystalline salt, Na2B4O7, with an alkaline taste, used as a flux in soldering metals and in the manufacture of glass, enamel, artificial gems, soaps, antiseptics, etc.
2. US
cheap, poorly made merchandise, esp. furniture
Word origin
ME < ML borax < Ar bauraq < Pers būrah; (sense 2) from the furniture formerly given as premiums by manufacturers of boraxsoap