Definition of transexion in English:

transexion

Pronunciation /tranˈsɛkʃn/ /trɑːnˈsɛkʃn/

noun

rare
  • Originally: †change from one sex to another (obsolete). In later use: the action or fact of imbuing a member of one sex with characteristics associated with the other.

Origin

Mid 17th century; earliest use found in Thomas Browne (1605–1682), physician and author. Irregularly from trans- + sex + -ion, perhaps after transition and also after other nouns with variants ending in -exion in the 17th cent.