polyacidadj.n.

Brit.

/ˌpɒlɪˈasɪd/, U.S.

/ˌpɑliˈæsəd/

Origin: Formed within English, by compounding. Etymons: poly- comb. form, acid n.

Etymology: < poly- comb. form + acid n. Compare French polyacide (1862 or earlier as adjective, 1902 or earlier as noun).

Chemistry.

A. adj.

1. Designating a base composed of molecules able to combine with more than one monovalent acid radical; designating a salt of such a base. Now disused.Formerly also: †(of an alcohol) polyhydric (obsolete).

ΘΚΠ

the world > matter > chemistry > chemical substances > bases > [adjective] > polyacid

polyacid1858

1858 Proc. Royal Soc. 9 152 It became extremely probable that the action of ammonia upon poly-acid alcohols would give rise to poly-ammonium bases.

1880 E. Cleminshaw tr. C. A. Wurtz Atomic Theory 198 Some time afterwards, when the existence of polyacid bases was admitted,..Graham discovered polybasic acids.

1904 Jrnl. Chem. Soc. 86 i. 698 (heading) The polyacid salts of rosaniline.

1912 E. Feilmann tr. E. Molinari Treat. Inorg. Chem. 423 When the salt is formed by the action of an acid on a base which has more than one hydroxyl (OH) group, that is, in the case of polyacid bases, such as Bi(OH)₃, Pb(OH)₂,..various types of salts may be formed.

1926 N. H. Furman Kolthoff's Indicators iv. 117 When all of the dissociation constants of polybasic acids, or polyacid bases are large, they behave like strong monobasic or acid compounds upon neutralization.

2. Of the nature of or relating to a polyacid.

ΚΠ

1956 Q. Rev. Biol. 31 175/2 The polyelectrolyte balance in cells may be altered by injecting polyanions (heparin.., nucleic acids, and polyacid dyes).

1974 D. M. Adams Inorg. Solids vii. 239 The main features of polyacid chemistry have been recognized for a long time, but not understood.

1990 Indian Jrnl. Chem. A. 29 32 Bael (fruit) gum polysaccharide [is] a polyacid polysaccharide..of still lower charge density.

B. n.

A compound which has more than one acidic group; esp. an acid containing polymeric anions.

ΘΚΠ

the world > matter > chemistry > elements and compounds > [noun] > compounds > types > compounds which have more than one acidic group

polyacid1911

1911 Jrnl. Chem. Soc. 100 265 The extension of Werner's co-ordination theory to poly-acids..facilitates the correct formulation of these acids.

1950 N. V. Sidgwick Chem. Elements II. 999 The molybdates and tungstates go much further, forming the highly condensed polyacids and hetero-poly-acids.

1999 Materials World Oct. 628/1 Recently, various calcium phosphate cements using organic acids or polyacids have been designed.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	polyacid
释义	polyacidadj.n. Brit. /ˌpɒlɪˈasɪd/, U.S. /ˌpɑliˈæsəd/ Origin: Formed within English, by compounding. Etymons: poly- comb. form, acid n. Etymology: < poly- comb. form + acid n. Compare French polyacide (1862 or earlier as adjective, 1902 or earlier as noun). Chemistry. A. adj. 1. Designating a base composed of molecules able to combine with more than one monovalent acid radical; designating a salt of such a base. Now disused.Formerly also: †(of an alcohol) polyhydric (obsolete). ΘΚΠ the world > matter > chemistry > chemical substances > bases > [adjective] > polyacid polyacid1858 1858 Proc. Royal Soc. 9 152 It became extremely probable that the action of ammonia upon poly-acid alcohols would give rise to poly-ammonium bases. 1880 E. Cleminshaw tr. C. A. Wurtz Atomic Theory 198 Some time afterwards, when the existence of polyacid bases was admitted,..Graham discovered polybasic acids. 1904 Jrnl. Chem. Soc. 86 i. 698 (heading) The polyacid salts of rosaniline. 1912 E. Feilmann tr. E. Molinari Treat. Inorg. Chem. 423 When the salt is formed by the action of an acid on a base which has more than one hydroxyl (OH) group, that is, in the case of polyacid bases, such as Bi(OH)₃, Pb(OH)₂,..various types of salts may be formed. 1926 N. H. Furman Kolthoff's Indicators iv. 117 When all of the dissociation constants of polybasic acids, or polyacid bases are large, they behave like strong monobasic or acid compounds upon neutralization. 2. Of the nature of or relating to a polyacid. ΚΠ 1956 Q. Rev. Biol. 31 175/2 The polyelectrolyte balance in cells may be altered by injecting polyanions (heparin.., nucleic acids, and polyacid dyes). 1974 D. M. Adams Inorg. Solids vii. 239 The main features of polyacid chemistry have been recognized for a long time, but not understood. 1990 Indian Jrnl. Chem. A. 29 32 Bael (fruit) gum polysaccharide [is] a polyacid polysaccharide..of still lower charge density. B. n. A compound which has more than one acidic group; esp. an acid containing polymeric anions. ΘΚΠ the world > matter > chemistry > elements and compounds > [noun] > compounds > types > compounds which have more than one acidic group polyacid1911 1911 Jrnl. Chem. Soc. 100 265 The extension of Werner's co-ordination theory to poly-acids..facilitates the correct formulation of these acids. 1950 N. V. Sidgwick Chem. Elements II. 999 The molybdates and tungstates go much further, forming the highly condensed polyacids and hetero-poly-acids. 1999 Materials World Oct. 628/1 Recently, various calcium phosphate cements using organic acids or polyacids have been designed. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.n.1858
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