• In chemistry, valence
  Valence (chemistry)
  In chemistry, valence, also known as valency or valence number, is a measure of the number of bonds formed by an atom of a given element. "Valence" can be defined as the number of valence bonds...
  
   is a measure of the number of chemical bonds formed by the atoms of a given element. Monovalent is a synonym of univalent.
• Monovalent ions contain one valence electron
  Valence electron
  In chemistry, valence electrons are the electrons of an atom that can participate in the formation of chemical bonds with other atoms. Valence electrons are the "own" electrons, present in the free neutral atom, that combine with valence electrons of other atoms to form chemical bonds. In a single...
  
  .
• In immunology, antivenom can be classified as monovalent when effective against a single species' venom.
• In immunology, a monovalent vaccine contains vaccine components directed at only one pathogen. A multivalent vaccine (also known as polyvalent
  Polyvalent
  In chemistry, polyvalence or multivalence refers to species that are not restricted to a distinct number of valence bonds....
  
  ) combines several vaccines (such as the MMR vaccine
  MMR vaccine
  The MMR vaccine is an immunization shot against measles, mumps, and rubella . It was first developed by Maurice Hilleman while at Merck in the late 1960s....
  
  ).
• In philosophy, monovalence is a view of reality that claims existence is eternal.
• In grammar, a monovalent verb
  Valency (linguistics)
  In linguistics, verb valency or valence refers to the number of arguments controlled by a verbal predicate. It is related, though not identical, to verb transitivity, which counts only object arguments of the verbal predicate...
  
   is a verb which takes only one argument
  Verb argument
  In linguistics, a verb argument is a phrase that appears in a syntactic relationship with the verb in a clause. In English, for example, the two most important arguments are the subject and the direct object....
  
  , i.e., an intransitive verb
  Intransitive verb
  In grammar, an intransitive verb is a verb that has no object. This differs from a transitive verb, which takes one or more objects. Both classes of verb are related to the concept of the transitivity of a verb....
  
  .

See also

• Valence (disambiguation)
• Polyvalent
  Polyvalent
  In chemistry, polyvalence or multivalence refers to species that are not restricted to a distinct number of valence bonds....
  
  
• Multivalent (disambiguation)
• Divalent
  Divalent
  In chemistry, a divalent ion or molecule has a valence of two and thus can form two bonds with other ions or molecules. An older term for divalent is bivalent....