onium

Definitions

noun In chem., a termination given to the names of compound radicals which are analogous in structure and chemical function to ammonium, NH₄, as phosphonium, PH₄, or tetramethylphosphonium, P (CH₃)₄.

noun chemistry any cation derived by the addition of a proton to the hydride of any element of the nitrogen, chalcogen or halogen families
noun chemistry any organic derivative of these compounds
noun physics the bound pair of a particle and its antiparticle

Sorry, no etymologies found.

Help support Wordnik (and make this page ad-free) by adopting the word onium.

The concept of superelectrophiles thus emerged from my previous studies on superacidic carbocation and onium ion systems.

George A. Olah - Autobiography 1995
Examples include onium and carboxonium ions, acyl cations, halonium, azonium, carbozonium ions, even certain substituted carbocations and the like.

George A. Olah - Autobiography 1995
More recently the concept of the "at" - complexes as a counterpart to the "onium" complexes has led to the development of a new chemistry from which have come the sodium tetra phenylborates.

Georg Wittig - Curriculum Vitae 1979
Related: Swine Flu is the top related story about pandemic-onium being spread via Twitter.

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r & figillum noftrum in noftri confenfus tefti - onium prefentibus iimiliter eft appenfum.

Subsidia diplomatica ad selecta juris Ecclesiastici Germaniae: et historiarum capita elucidanda ... 1777