the hypothetical acid H2Cr2O7, from which dichromates are derived.
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British Dictionary definitions for dichromic acid
an unstable dibasic oxidizing acid known only in solution and in the form of dichromate salts. Formula: H 2 Cr 2 O 7
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