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adjective Chemistry.
  1. (of an acid) having four atoms of hydrogen replaceable by basic atoms or groups.
  2. containing four basic atoms or groups having a valence of one.

Origin of tetrabasic

First recorded in 1860–65; tetra- + basic
Related formstet·ra·ba·sic·i·ty [te-truh-bey-sis-i-tee] /ˌtɛ trə beɪˈsɪs ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for tetrabasic


  1. (of an acid) containing four replaceable hydrogen atoms
Derived Formstetrabasicity (ˌtɛtrəbeɪˈsɪsɪtɪ), noun
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