adjective Chemistry.
  1. capable of combining with three molecules of a monobasic acid: a triacid base.
  2. noting acid salts containing three replaceable hydrogen atoms.

Origin of triacid

First recorded in 1885–90; tri- + acid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for triacid

Historical Examples of triacid

  • Their true nature is shown by their behaviour with the triacid solution.

  • In triacid preparations the granulation is unstained, and the mast cells appear as clear, polynuclear cells, free from granules.

  • They may be counted in leukæmic blood with the aid of the triacid or eosine-methylene blue stain.

  • The staining of the blood specimen in triacid requires only a little fixation, cp.

British Dictionary definitions for triacid


  1. (of a base) capable of reacting with three molecules of a monobasic acid
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