octammonio-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 third syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. octammonio-cobaltic Brit.

/ɒktəˌməʊnɪə(ʊ)kəʊˈbɔːltɪk/,

/ɒktəˌməʊnɪə(ʊ)kəʊˈbɒltɪk/, U.S.

/ˌɑktəˌmoʊnioʊˌkoʊˈbɔltɪk/,

/ˌɑktəˌmoʊnioʊˌkoʊˈbɑltɪk/.

Origin: Formed within English, by compounding. Etymons: octo- comb. form, ammonio- comb. form.

Etymology: < octo- comb. form + ammonio- comb. form.Attested in a small number of 19th and 20th cent. formations, as below.

Chemistry. rare.

Forming terms indicating the presence of eight ammonium ions per molecule of a compound.

ΚΠ

1866 H. Watts Dict. Chem. IV. 677 (heading) Octammonio-diplatinic Compounds.

1866 H. Watts Dict. Chem. IV. 678 Raewsky's octammonio-diplatinic-nitratoxychloride.

1906 M. M. P. Muir & H. F. Morley Watts' Dict. Chem. II. 223/1 Octamines or Octammonio-cobaltic salts.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	octammonio-
释义	octammonio-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 third syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. octammonio-cobaltic Brit. /ɒktəˌməʊnɪə(ʊ)kəʊˈbɔːltɪk/, /ɒktəˌməʊnɪə(ʊ)kəʊˈbɒltɪk/, U.S. /ˌɑktəˌmoʊnioʊˌkoʊˈbɔltɪk/, /ˌɑktəˌmoʊnioʊˌkoʊˈbɑltɪk/. Origin: Formed within English, by compounding. Etymons: octo- comb. form, ammonio- comb. form. Etymology: < octo- comb. form + ammonio- comb. form.Attested in a small number of 19th and 20th cent. formations, as below. Chemistry. rare. Forming terms indicating the presence of eight ammonium ions per molecule of a compound. ΚΠ 1866 H. Watts Dict. Chem. IV. 677 (heading) Octammonio-diplatinic Compounds. 1866 H. Watts Dict. Chem. IV. 678 Raewsky's octammonio-diplatinic-nitratoxychloride. 1906 M. M. P. Muir & H. F. Morley Watts' Dict. Chem. II. 223/1 Octamines or Octammonio-cobaltic salts. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < comb. form1866
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