Feminine-of-center is a descriptive term for people who feel they have a feminine gender identity, especially those who do not identify as women. The term is most commonly used by male-to-female transgender individuals.
People who use the term feminine-of-center typically see gender as a spectrum, with femininity at one end and masculinity at the other. Gender-neutrality sits at the central position on this scale. People who identify as feminine-of-center position their own gender identity somewhere at the feminine side of the center position.
Feminine-of-center is sometimes called feminine-centered.