eonism

Etymology
Coined 1920 by British physician and sexologist (1859–1939) after  (1728–1810), a French diplomat, spy and soldier who presented as male for 49 years, then as female for 33. Ellis had previously used the term.

Noun

 * 1)  The pretence of being the opposite sex, especially that by a man of being a woman; transvestism.
 * 2) * 2013, C. N. Armstrong, 12: Transvestism, D. Robertson Smith, William M. Davidson (editors), Symposium on Nuclear Sex, Elsevier (Butterworth-Heinemann), page 88,
 * Homosexuals do not as a rule want to change their sex and identity. This is the fundamental anomaly in eonism.
 * 1) * 2013, C. N. Armstrong, 12: Transvestism, D. Robertson Smith, William M. Davidson (editors), Symposium on Nuclear Sex, Elsevier (Butterworth-Heinemann), page 88,
 * Homosexuals do not as a rule want to change their sex and identity. This is the fundamental anomaly in eonism.

Translations

 * French:
 * German: Eonismus,
 * Italian: eonismo