Transversion is a term that refers to the change of a single nitrogen base pair in the DNA sequence from one purine to another or from one pyrimidine to another. While there are no direct synonyms for this term, there are related terms that can be used in certain contexts. For example, transversion could be used interchangeably with the term single nucleotide polymorphism (SNP) when discussing genetic variations. Alternatively, it could be referred to as a point mutation or nonsynonymous mutation when discussing the impact of the change on protein function. In molecular biology, it could also be referred to as a base substitution or nucleotide substitution.