monovalent

Containing antigens from a single strain of a microorganism or virus. Used of a vaccine or serum.

Having only one site of attachment. Used of an antibody or antigen.

Univalent.

In chem., having a valence equal to that of hydrogen, represented by unity. Also, and more properly, called univalent.

Having a valence of one; univalent. See univalent.

univalent

having a valence of 1

containing only one kind of antibody