purpureo-comb. form

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

/pəːˌpjʊərɪə(ʊ)ˈkəʊbɔːlt/,

/pəːˌpjʊərɪə(ʊ)ˈkəʊbɒlt/,

/pəːˌpjʊərɪə(ʊ)ˈkəʊb(ə)lt/, U.S.

/pərˌp(j)ʊrioʊˈkoʊˌbɔlt/,

/pərˌp(j)ʊrioʊˈkoʊˌbɑlt/.

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin purpureus , -o- connective.

Etymology: < classical Latin purpureus purple (see purpureous adj.) + -o- connective. Compare scientific Latin purpureo- (formations in which are found from at least the late 18th cent. as botanical and zoological specific epithets).Found in a small number of formations exemplified below.

Chemistry. Now rare.

Used to denote certain purple coordination compounds of metals with ammonia, esp. cobaltammine complexes with five ammonia ligands per cobalt atom, as purpureo-cobalt, purpureo-cobaltic.

ΚΠ

1856 W. Gibbs & F. A. Genth in Smithsonian Contrib. Knowl. (1857) 9 Art. v. 48 The salts of Xanthocobalt may be prepared..from neutral, acid, or ammoniacal solutions of the salts of Roseocobalt or Purpureocobalt.

1863 H. Watts Dict. Chem. I. 1052 Pentammonio-cobaltic Salts..may be divided into two groups, the Roseo-cobaltic salts, which have a red colour,..and the Purpureo-cobaltic salts, which are purple, or violet-red.

1893 Science 1 Sept. 116/1 (heading) Synthesis of purpureo- and luteo-chromium chlorides.

1924 Jrnl. Amer. Chem. Soc. 46 362 Sample C..had been purified by crystallization of the purpureo-cobalt chloride.

1940 G. H. J. Adlam & L. S. Price Higher School Certificate Inorg. Chem. (ed. 2) liv. 573 The pentammines [of cobalt] are purple-red and are known as ‘purpureo’ salts.

1978 Jrnl. Fluorine Chem. 11 320 [Coa₅Cl]Cl₂—the purpureo chloride dissolves in HF with the loss of only two thirds of the chloride.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	purpureo-
释义	purpureo-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is always maintained on the second syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. purpureo-cobalt Brit. /pəːˌpjʊərɪə(ʊ)ˈkəʊbɔːlt/, /pəːˌpjʊərɪə(ʊ)ˈkəʊbɒlt/, /pəːˌpjʊərɪə(ʊ)ˈkəʊb(ə)lt/, U.S. /pərˌp(j)ʊrioʊˈkoʊˌbɔlt/, /pərˌp(j)ʊrioʊˈkoʊˌbɑlt/. Origin: A borrowing from Latin, combined with an English element. Etymons: Latin purpureus , -o- connective. Etymology: < classical Latin purpureus purple (see purpureous adj.) + -o- connective. Compare scientific Latin purpureo- (formations in which are found from at least the late 18th cent. as botanical and zoological specific epithets).Found in a small number of formations exemplified below. Chemistry. Now rare. Used to denote certain purple coordination compounds of metals with ammonia, esp. cobaltammine complexes with five ammonia ligands per cobalt atom, as purpureo-cobalt, purpureo-cobaltic. ΚΠ 1856 W. Gibbs & F. A. Genth in Smithsonian Contrib. Knowl. (1857) 9 Art. v. 48 The salts of Xanthocobalt may be prepared..from neutral, acid, or ammoniacal solutions of the salts of Roseocobalt or Purpureocobalt. 1863 H. Watts Dict. Chem. I. 1052 Pentammonio-cobaltic Salts..may be divided into two groups, the Roseo-cobaltic salts, which have a red colour,..and the Purpureo-cobaltic salts, which are purple, or violet-red. 1893 Science 1 Sept. 116/1 (heading) Synthesis of purpureo- and luteo-chromium chlorides. 1924 Jrnl. Amer. Chem. Soc. 46 362 Sample C..had been purified by crystallization of the purpureo-cobalt chloride. 1940 G. H. J. Adlam & L. S. Price Higher School Certificate Inorg. Chem. (ed. 2) liv. 573 The pentammines [of cobalt] are purple-red and are known as ‘purpureo’ salts. 1978 Jrnl. Fluorine Chem. 11 320 [Coa₅Cl]Cl₂—the purpureo chloride dissolves in HF with the loss of only two thirds of the chloride. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < comb. form1856
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