| polybasic | <chemistry> Capable of neutralising, or of combining with, several molecules of a monacid base; having several hydrogen atoms capable of being replaced by basic radicals; said of certain acids; as, sulphuric acid is polybasic. Origin: Poly- + basic. Source: Websters Dictionary (01 Mar 1998) |
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| polybasic acid | An acid containing more than three ionizable atoms of hydrogen in the molecule. (05 Mar 2000) |