hydroxonium ion

/ (ˌhaɪdrɒkˈsəʊnɪəm) /

noun

a positive ion, H 3 O +, formed by the attachment of a proton to a water molecule: occurs in solutions of acids and behaves like a hydrogen ionAlso called: hydronium ion

QUIZZES

THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?

Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
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