acidifyv.

Brit.

/əˈsɪdᵻfʌɪ/, U.S.

/əˈsɪdəˌfaɪ/,

/æˈsɪdəˌfaɪ/

Origin: Formed within English, by derivation. Etymons: acid adj., -ify suffix.

Etymology: < acid adj. + -ify suffix. Compare French acidifier (1786). Compare acidifying adj.

a. transitive. Originally: (Chemistry) to combine with (a substance) so as to form an acid, to convert into an acid (cf. acidifying adj.). In later use more widely: to make (a solution, medium, etc.) acidic or more acidic; to add acid to. Also intransitive.

ΚΠ

1783 [implied in: T. Henry tr. A. Lavoisier Ess. Atmospheric Air viii. 99 The acidifying or oxyginous principle [Fr. le principe acidifiant ou oxygine], combined with the matter of fire, of heat, and of light, forms pure or dephlogisticated air. (at acidifying adj.)].

1789 tr. L. de Morveau in R. Kirwan Ess. Phlogiston (new ed.) 147 If fixed air be the acidifying principle, it is impossible that it should have served at the same time to acidify the phosphorus, and render the lime effervescent.

1801 W. Henry Epitome Chem. i. xxviii. 113 Sugar..heated with nitric acid..is acidified.

1873 C. H. Ralfe Outl. Physiol. Chem. 132 The parapeptone being removed by filtration, the neutralized filtrate is again acidified.

1907 G. M. Norman Systematic Pract. Org. Chem. i. v. 18 Cool, acidify with dilute hydrochloric acid and add ferric chloride.

1934 C. C. Steele Introd. Plant Biochem. i. i. 3 Add a little ammonium hydroxide, then acidify with dilute nitric acid.

1990 R. Staines Market Gardening iv. 43 Continuous cropping will also help to acidify a soil.

†b. transitive. figurative. To transform into something sour or acid. Obsolete. rare.

ΘΚΠ

the world > physical sensation > taste and flavour > sourness or acidity > make sour [verb (transitive)]

sharpa1425

sourc1460

intersour1599

unsweeten1611

blink1616

dissweeten1622

besoura1660

sharpen1675

acidulate1684

whig1756

acidify1837

tack1868

tarten1925

acidize1936

1837 T. Carlyle French Revol. III. iii. iii. 181 His thin existence all acidified into rage, and preternatural insight of suspicion.

2. intransitive. To become acid or acidic.

ΚΠ

1855 J. S. Mill Let. 2 Jan. (1972) XIV. 278 My breakfast today was two cups of hot milk and even that acidified in my stomach.

1886 Lancet 2 Oct. 659/1 In its first year the wine of the Commandery is apt to acidify, owing to a second fermentation.

1993 Harper's Mag. Jan. 43/2 They were sort of just down in the basement in the corner and nobody even used them. The paper was acidifying.

2004 Northern Woodlands Summer 39 The water acidified over the millennia and created a habitat that only acidophiles..could love.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	acidify
释义	acidifyv. Brit. /əˈsɪdᵻfʌɪ/, U.S. /əˈsɪdəˌfaɪ/, /æˈsɪdəˌfaɪ/ Origin: Formed within English, by derivation. Etymons: acid adj., -ify suffix. Etymology: < acid adj. + -ify suffix. Compare French acidifier (1786). Compare acidifying adj. 1. a. transitive. Originally: (Chemistry) to combine with (a substance) so as to form an acid, to convert into an acid (cf. acidifying adj.). In later use more widely: to make (a solution, medium, etc.) acidic or more acidic; to add acid to. Also intransitive. ΚΠ 1783 [implied in: T. Henry tr. A. Lavoisier Ess. Atmospheric Air viii. 99 The acidifying or oxyginous principle [Fr. le principe acidifiant ou oxygine], combined with the matter of fire, of heat, and of light, forms pure or dephlogisticated air. (at acidifying adj.)]. 1789 tr. L. de Morveau in R. Kirwan Ess. Phlogiston (new ed.) 147 If fixed air be the acidifying principle, it is impossible that it should have served at the same time to acidify the phosphorus, and render the lime effervescent. 1801 W. Henry Epitome Chem. i. xxviii. 113 Sugar..heated with nitric acid..is acidified. 1873 C. H. Ralfe Outl. Physiol. Chem. 132 The parapeptone being removed by filtration, the neutralized filtrate is again acidified. 1907 G. M. Norman Systematic Pract. Org. Chem. i. v. 18 Cool, acidify with dilute hydrochloric acid and add ferric chloride. 1934 C. C. Steele Introd. Plant Biochem. i. i. 3 Add a little ammonium hydroxide, then acidify with dilute nitric acid. 1990 R. Staines Market Gardening iv. 43 Continuous cropping will also help to acidify a soil. †b. transitive. figurative. To transform into something sour or acid. Obsolete. rare. ΘΚΠ the world > physical sensation > taste and flavour > sourness or acidity > make sour [verb (transitive)] sharpa1425 sourc1460 intersour1599 unsweeten1611 blink1616 dissweeten1622 besoura1660 sharpen1675 acidulate1684 whig1756 acidify1837 tack1868 tarten1925 acidize1936 1837 T. Carlyle French Revol. III. iii. iii. 181 His thin existence all acidified into rage, and preternatural insight of suspicion. 2. intransitive. To become acid or acidic. ΚΠ 1855 J. S. Mill Let. 2 Jan. (1972) XIV. 278 My breakfast today was two cups of hot milk and even that acidified in my stomach. 1886 Lancet 2 Oct. 659/1 In its first year the wine of the Commandery is apt to acidify, owing to a second fermentation. 1993 Harper's Mag. Jan. 43/2 They were sort of just down in the basement in the corner and nobody even used them. The paper was acidifying. 2004 Northern Woodlands Summer 39 The water acidified over the millennia and created a habitat that only acidophiles..could love. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < v.1783
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