English edit

Etymology edit

inversion +‎ -ism

Noun edit

inversionism (uncountable)

  1. (obsolete, psychology) Homosexuality, regarded as sexual inversion.
    • 1855, Andrew Jackson Davis, The Great Harmonia: The reformer, page 117:
      Parents and teachers, having but little or no knowledge of the laws of nature, are unable to detect the victims of inversionism.