onium compound

onium salt

noun

chem any salt in which the positive ion (onium ion) is formed by the attachment of a proton to a neutral compound, as in ammonium, oxonium, and sulphonium compounds

Nearby words

  1. onions,
  2. onions, c. t.,
  3. onionskin,
  4. oniony,
  5. onitsha,
  6. onkelos,
  7. onkus,
  8. onlap,
  9. onlay,
  10. onliest

Word Origin for onium compound

C20: from (amm) onium

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012