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adj. Chemistry Having four valences.

adj. Chemistry Having a valence of four; tetravalent.

adj. Having a valence of four.

n. Any quadrivalent chromosome.

adj. 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.

In chem., 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.

n. A quadrivalent atom or element.

"Soldan and colleagues say that genital warts "exert a considerable impact on health services, a large proportion of which could be prevented through immunisation using the quadrivalent human papillomavirus vaccine"."

trivalent    bivalent   

tetravalent