'Pentabasic' definitions:
Definition of 'Pentabasic'
From: GCIDE
- Pentabasic \Pen`ta*ba"sic\, a. [Penta- + basic.] (Chem.) Capable of uniting with five molecules of a monacid base; having five acid hydrogen atoms capable of substitution by a basic radical; -- said of certain acids. [1913 Webster]