transversion
noun
trans·ver·sion
| \ tran(t)s-ˈvər-zhən, tranz-
\
\
Medical Definition of transversion
1
: the eruption of a tooth in an abnormal position on the jaw
2
: a mutation in RNA or DNA that results from the substitution of a purine base for a pyrimidine base or of a pyrimidine base for a purine base