black saltn.

Brit.

/ˌblak ˈsɔːlt/,

/ˌblak ˈsɒlt/, U.S.

/ˈblæk ˈsɔlt/,

/ˈblæk ˈsɑlt/

Forms: see black adj. and n. and salt n.¹

Origin: Formed within English, by compounding; originally modelled on a Latin lexical item. Etymons: black adj., salt n.¹

Etymology: < black adj. + salt n.¹, originally after post-classical Latin sal niger (a1363 (in the passage translated in quot. a1387) or earlier).

Any of various inorganic salts that are naturally dark in colour, or are darkened by admixed charcoal, soot, etc.; spec. (in plural) impure potash obtained by leaching wood ash and evaporating the resulting solution (now historical).

ΘΚΠ

the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > lixiviation > wood ashes after

black salt1881

a1387 J. Trevisa tr. R. Higden Polychron. (St. John's Cambr.) (1865) I. 221 (MED) A confeccioun of brymston and of blak salt [L. nigri salis].

1651 J. French Art Distillation i. 32 Then take all the Lye, being first filtred; and vapour it away, and at the bottome thou shalt find a black Salt.

1676 J. Sterpin tr. L. J. Debes Færoœ iii. 177 They partly melt the fat of the whole [Whale] to make Train Oyl, salting the rest with black salt, to make use of it as of Bacon.

1694 J. Pechey Compl. Herbal 136/2 Take of Mustard-seed bruis'd two Drams, of the Roots of Garlick one Ounce, of Black-Soap two Ounces, of Black-Salt one Ounce.

1792 J. Leacock Let. 25 Nov. in T. Jefferson Papers (1990) XXIV. 658 The Lye ought to be strong, ere it is Evaporated into black salts.

1881 W. M. Thayer From Log Cabin to White House x. 157 Potash..in its crude state, was called ‘black-salts.’

1897 F. D. Rogers Folk-tales Northern Border 205 The old gentleman..was clearing up a large farm, and..had a small potash works, where he worked them [sc. ashes] into potash or black salts.

1922 T. M. Lowry Inorg. Chem. xxxii. 571 Evaporation at the boiling-point gives black salt, a crude and impure monohydrate, Na₂CO₃,H₂O, contaminated by coal-dust and other impurities.

1995 Forest & Conservation Hist. 39 19/2 One acre ‘of hard timbered land’ dominated by maple trees could yield up to five hundred pounds of black salts.

2005 N.Y. Times (National ed.) 9 Mar. d5/2 Chaat masala..must always include kala namak, a black salt with a pleasant whiff of sulfur.

This entry has been updated (OED Third Edition, September 2011; most recently modified version published online December 2021).

单词	black salt
释义	black saltn. Brit. /ˌblak ˈsɔːlt/, /ˌblak ˈsɒlt/, U.S. /ˈblæk ˈsɔlt/, /ˈblæk ˈsɑlt/ Forms: see black adj. and n. and salt n.¹ Origin: Formed within English, by compounding; originally modelled on a Latin lexical item. Etymons: black adj., salt n.¹ Etymology: < black adj. + salt n.¹, originally after post-classical Latin sal niger (a1363 (in the passage translated in quot. a1387) or earlier). Any of various inorganic salts that are naturally dark in colour, or are darkened by admixed charcoal, soot, etc.; spec. (in plural) impure potash obtained by leaching wood ash and evaporating the resulting solution (now historical). ΘΚΠ the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > lixiviation > wood ashes after black salt1881 a1387 J. Trevisa tr. R. Higden Polychron. (St. John's Cambr.) (1865) I. 221 (MED) A confeccioun of brymston and of blak salt [L. nigri salis]. 1651 J. French Art Distillation i. 32 Then take all the Lye, being first filtred; and vapour it away, and at the bottome thou shalt find a black Salt. 1676 J. Sterpin tr. L. J. Debes Færoœ iii. 177 They partly melt the fat of the whole [Whale] to make Train Oyl, salting the rest with black salt, to make use of it as of Bacon. 1694 J. Pechey Compl. Herbal 136/2 Take of Mustard-seed bruis'd two Drams, of the Roots of Garlick one Ounce, of Black-Soap two Ounces, of Black-Salt one Ounce. 1792 J. Leacock Let. 25 Nov. in T. Jefferson Papers (1990) XXIV. 658 The Lye ought to be strong, ere it is Evaporated into black salts. 1881 W. M. Thayer From Log Cabin to White House x. 157 Potash..in its crude state, was called ‘black-salts.’ 1897 F. D. Rogers Folk-tales Northern Border 205 The old gentleman..was clearing up a large farm, and..had a small potash works, where he worked them [sc. ashes] into potash or black salts. 1922 T. M. Lowry Inorg. Chem. xxxii. 571 Evaporation at the boiling-point gives black salt, a crude and impure monohydrate, Na₂CO₃,H₂O, contaminated by coal-dust and other impurities. 1995 Forest & Conservation Hist. 39 19/2 One acre ‘of hard timbered land’ dominated by maple trees could yield up to five hundred pounds of black salts. 2005 N.Y. Times (National ed.) 9 Mar. d5/2 Chaat masala..must always include kala namak, a black salt with a pleasant whiff of sulfur. This entry has been updated (OED Third Edition, September 2011; most recently modified version published online December 2021). < n.a1387
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