eonism

[ ee-uh-niz-uh m ]
/ ˈi əˌnɪz əm /

noun Psychiatry.

the adoption of feminine mannerisms, clothing, etc., by a male.

Origin of eonism

1925–30; after the Chevalier d'Éon (died 1810), Frenchman who posed as a woman
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for eonism

eonism

/ (ˈiːəˌnɪzəm) /

noun

psychiatry the adoption of female dress and behaviour by a maleSee also transvestite

Word Origin for eonism

C19: named after Charles Éon de Beaumont (died 1810), French transvestite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012