-oniumcomb. form¹

Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly.

Origin: Formed within English, by clipping or shortening. Etymon: ammonium n.

Etymology: < -onium (in ammonium n.).Earliest in phosphonium n.

Chemistry.

Forming the names of complex cations that contain a more or less electronegative central atom, usually bonded to a number of protons (or to other species that are regarded as substituents), as carbonium n., hydrazonium n., nitronium n., phosphonium n., etc.

ΚΠ

1858 Proc. Royal Soc. 9 289 Under the influence of oxide or silver, the bromide yields an alkaline solution possessing all the characters of the -onium-bases.

1931 Jrnl. Chem. Soc. i. 1612 The termination ine is reserved exclusively for nitrogenous bases... For aliphatic compounds containing quinquevalent nitrogen the termination ine will be changed to onium.

1971 Nomencl. Inorg. Chem. (I.U.P.A.C.) (ed. 2) 20 Names for polyatomic cations derived by addition of more protons than required to give a neutral unit to monatomic anions, are formed by adding the ending -onium to the root name of the anion element.

This entry has been updated (OED Third Edition, June 2004; most recently modified version published online December 2018).

-oniumcomb. form²

Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly.

Origin: Formed within English, by clipping or shortening. Etymon: positronium n.

Etymology: < -onium (in positronium n.).Earliest in nucleonium n.

Particle Physics.

Forming the names of bound states of a particle and its antiparticle, as charmonium n., toponium n.

ΚΠ

1987 A. Nickon & E. F. Silversmith Org. Chem.: Name Game xiii. 168 High-energy physicists have also cornered the ‘onium’ market with discoveries of states they describe as ‘charmonium’, ‘quarkonium’, ‘gluonium’, ‘bottomonium’.

This entry has been updated (OED Third Edition, June 2004; most recently modified version published online December 2018).

单词	-onium
释义	-oniumcomb. form¹ Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly. Origin: Formed within English, by clipping or shortening. Etymon: ammonium n. Etymology: < -onium (in ammonium n.).Earliest in phosphonium n. Chemistry. Forming the names of complex cations that contain a more or less electronegative central atom, usually bonded to a number of protons (or to other species that are regarded as substituents), as carbonium n., hydrazonium n., nitronium n., phosphonium n., etc. ΚΠ 1858 Proc. Royal Soc. 9 289 Under the influence of oxide or silver, the bromide yields an alkaline solution possessing all the characters of the -onium-bases. 1931 Jrnl. Chem. Soc. i. 1612 The termination ine is reserved exclusively for nitrogenous bases... For aliphatic compounds containing quinquevalent nitrogen the termination ine will be changed to onium. 1971 Nomencl. Inorg. Chem. (I.U.P.A.C.) (ed. 2) 20 Names for polyatomic cations derived by addition of more protons than required to give a neutral unit to monatomic anions, are formed by adding the ending -onium to the root name of the anion element. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online December 2018). -oniumcomb. form² Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly. Origin: Formed within English, by clipping or shortening. Etymon: positronium n. Etymology: < -onium (in positronium n.).Earliest in nucleonium n. Particle Physics. Forming the names of bound states of a particle and its antiparticle, as charmonium n., toponium n. ΚΠ 1987 A. Nickon & E. F. Silversmith Org. Chem.: Name Game xiii. 168 High-energy physicists have also cornered the ‘onium’ market with discoveries of states they describe as ‘charmonium’, ‘quarkonium’, ‘gluonium’, ‘bottomonium’. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online December 2018). < comb. form¹1858comb. form²1987
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-oniumcomb. form1

-oniumcomb. form2

-oniumcomb. form¹

-oniumcomb. form²