资料来源 : pyDict

五元硷性的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.