a man had a feminine soul, or anima, and a woman had a masculine soul, or animus. This corresponded to the fact that men and women had both masculine and feminine traits.
This passage delivers Jung’s canonical structural definition: the masculine soul (animus) is the contrasexual inner figure appearing in women, complementary to the anima in men, grounded in the universal bisexuality of human nature.
, The Red Book: Liber Novus, 2009thesis