音标：[,tetrә'beisik] ；

a. [化]四代的, 四元的, 四碱的

a. Capable of neutralizing four molecules of a monacid
base; having four hydrogen atoms capable of replacement by bases;
quadribasic; -- said of certain acids; thus, normal silicic acid,
Si(OH)4, is a tetrabasic acid.

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