n (genetics) A point mutation in which one base is replaced by another of the same class (purine or pyrimidine); compare transversion.
n (education) Professional special education assistance for children or adults in the process of leaving one educational environment or support program for another to relatively more independent living.
n (LGBT) The process or act of changing from one gender role to another, or of bringing one's outward appearance in line with one's internal gender identity.
v (LGBT) To change from one gender role to another, or bring one's outward appearance in line with one's internal gender identity.