Neutrois (pronounced: nu-traw) is a non-binary gender identity that is neutral, both with respect to the male-female spectra and with respect to any other gender identity. It exists under the genderqueer and transgender umbrellas.
The word "neutrois" was coined by H. A. Burnham in 1995.
There is not a "one size fits all" definition of neutrois.
The most common definition for agender is lack of gender.  Agender is also an umbrella term. It can also mean complete lack of gender.
Neutral gender can mean any of the previously offered definitions or a middle ground on the male-female spectra.
Null-gender is a gender that does not include aspects of being male or female. Sometimes null-gender people will reject gender stereotypes and behavioral norms. 
Transitioning can take different forms for genderless people, such as name change, pronoun change, hormone therapy, surgery  to more accurately represent their gender, or wearing clothing to express their gender identity more accurately.  Not all people who identity as neutrois wish to transition.
- Neutrois Nonsense: living with a non-binary gender in a binary world, also on Tumblr
- Genderqueer ID
- Rescources on neutrois.com