the GNU version of the Collaborative International Dictionary of English
adj. Having a valence of one; univalent. See univalent.
The Century Dictionary and Cyclopedia
In chem., having a valence equal to that of hydrogen, represented by unity. Also, and more properly, called univalent.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. having a valence of 1
adj. containing only one kind of antibody
Word Usage
"The atomic interpretation of electrolysis required a corresponding atomistic interpretation of electric charge, with each monovalent ion carrying a single unit of charge, a bi-valent ion carrying two such units and so on."