adjective Etymology: -onium Date: 1905 being or characterized by a usually complex cation

New Collegiate Dictionary. 2001.

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  • ONIUM — locus in Peloponneso, Polyaen. l. 2. c. 3. com. 3. et 9. Sic quoque Thucydidi l. 2. c. 52. et Xenophonti, l. 6. Graec. et 7. ubi circa Corinth. videtur. ubi Onii, nempe montes. Circa Onium, vel Oneum, oppid. Cenchreis proximum, pugnatum esse… …   Hofmann J. Lexicon universale

  • -onium — [ō′nē əm] [< (AMM)ONIUM] Chem. suffix forming nounsChem. suffix 1. any of a group of compounds that are isologues of ammonium [sulfonium] 2. a cation [hydronium] …   English World dictionary

  • Onium — Not to be confused with onium compounds, ions such as ammonium. An onium (plural: onia) is the bound state of a particle and its antiparticle. They are usually named by adding the suffix onium to the name of the constituting particle. However,… …   Wikipedia

  • -onium — o|ni|um [zu ↑ Ammonium] Suffix in systematischen Namen von Kationen, (Onium Ionen), die sich von Hydriden der Stickstoff , Chalkogen u. Halogengruppen durch Aufnahme eines Protons (H+) ableiten, sowie von kationischen Derivaten, in denen… …   Universal-Lexikon

  • onium — oni·um ō nē əm adj being or characterized by a usu. complex cation <onium salts> * * * oni·um (oґne əm) a term applied to a cation in which nitrogen has its maximum covalency, as in the ammonium ion NH4+. The compounds include betaines …   Medical dictionary

  • onium — ˈōnēəm, ˈōnyəm adjective Etymology: onium : characterized by a cation that is usually complex (as oxonium, pyridinium, or a substituted ammonium) compare quaternary ammonium compound …   Useful english dictionary

  • -onium — noun suffix Etymology: New Latin, from ammonium an ion having a positive charge < hydronium > compare ium 1b …   New Collegiate Dictionary

  • Æonium — Aeonium Aeonium …   Wikipédia en Français

  • -onium — Chem. a suffix used in the names of complex cations: oxonium. [extracted from AMMONIUM] * * * …   Universalium

  • onium — noun a) any cation derived by the addition of a proton to the hydride of any element of the nitrogen, chalcogen or halogen families b) any organic …   Wiktionary

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