mercapto-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the second syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. mercapto-acid Brit.

/məːˌkaptəʊˈasɪd/, U.S.

/mərˌkæptoʊˈæsəd/.

Origin: Formed within English, by derivation. Etymons: mercaptan n., -o- connective.

Etymology: < mercapt- (in mercaptan n.) + -o- connective.Formations occur from the late 19th cent.

Chemistry.

Categories »

1. Forming names of compounds containing the radical —SH, as mercaptoethanol n., mercaptopurine n., etc.

2. Prefixed to words other than chemical names (usually as a separable element), to designate or indicate the presence or involvement of the radical —SH.

ΚΠ

1896 Jrnl. Chem. Soc. 70 412 Unsymmetrical homologues of thiodiglycollic acid..are prepared by the interaction of the neutral sodium salts of mercapto-acids and those of haloid fatty acids.

1903 Amer. Chem. Jrnl. 29 481 On boiling this mercapto derivative with hydrochloric acid we obtained thymine.

1930 Chem. Rev. 7 511 Mercapto acids may be made in the same way as hydroxy acids.

1957 R. H. Barry in E. Sagarin Cosmetics xx. 468 These inventors obtained coverage also in Great Britain for other organic mercapto compounds which function in alkaline-reacting media as depilatories.

1986 M. Kogut tr. H. G. Schlegel Gen. Microbiol. i. 7 Sulphur is present in living cells mainly as the mercapto group in sulphur-containing amino acids.

This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).

单词	mercapto-
释义	mercapto-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the second syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. mercapto-acid Brit. /məːˌkaptəʊˈasɪd/, U.S. /mərˌkæptoʊˈæsəd/. Origin: Formed within English, by derivation. Etymons: mercaptan n., -o- connective. Etymology: < mercapt- (in mercaptan n.) + -o- connective.Formations occur from the late 19th cent. Chemistry. Categories » 1. Forming names of compounds containing the radical —SH, as mercaptoethanol n., mercaptopurine n., etc. 2. Prefixed to words other than chemical names (usually as a separable element), to designate or indicate the presence or involvement of the radical —SH. ΚΠ 1896 Jrnl. Chem. Soc. 70 412 Unsymmetrical homologues of thiodiglycollic acid..are prepared by the interaction of the neutral sodium salts of mercapto-acids and those of haloid fatty acids. 1903 Amer. Chem. Jrnl. 29 481 On boiling this mercapto derivative with hydrochloric acid we obtained thymine. 1930 Chem. Rev. 7 511 Mercapto acids may be made in the same way as hydroxy acids. 1957 R. H. Barry in E. Sagarin Cosmetics xx. 468 These inventors obtained coverage also in Great Britain for other organic mercapto compounds which function in alkaline-reacting media as depilatories. 1986 M. Kogut tr. H. G. Schlegel Gen. Microbiol. i. 7 Sulphur is present in living cells mainly as the mercapto group in sulphur-containing amino acids. This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022). < comb. form1896
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