trivalent

Having valence 3.

Having three sites of attachment. Used of an antibody or antigen.

Containing antigens from three strains of a microorganism or virus. Used of a vaccine or serum.

In chem., equivalent in combining or displacing power to three monad atoms; triadic: applied to an element or a radical. Also triatomic.

Having a valence of three; capable of being combined with, substituted for, or compared with, three atoms of hydrogen; — said of triad atoms or radicals; thus, nitrogen is trivalent in ammonia.

having a valence of 3

Any trivalent chromosome.

having a valence of three