• Tetravalent.
  • A quadrivalent atom or element.
  • In <em>chem.</em>, noting an atom the equivalence of which is four, or an element one atom of which is equivalent, in combining power, to four atoms of hydrogen; tetradic; tetratomic.
  • Having a valence of four; capable of combining with, being replaced by, or compared with, four monad atoms; tetravalent; -- said of certain atoms and radicals.
  • Having a <xref>valence</xref> of <xref>four</xref>.
  • Any quadrivalent chromosome.
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