#nullossex

Sexlessness: absent/null sex identity; an umbrella term for lacking sexed characteristics or qualities (planned/desired or not), such as in nullosex (nullogenital, nullogonadal), asexed/assex (agonadal (gonadal agenesis), agenital (genital aplasia), ansex (angenital, angonadal, sterile)), nonsexed/unsex(ed) and desex/ed (i.e. eunuchs).

I mentioned it gonads and genitalia (also known as “primary/secondary” sexes), but this could also apply to hormonal, phenotypic, genic/genetic &/or genotypic/chromosomal/chromosomic sexes in some levels (karyotype, sex genes, chromosomes, genotype, phenotype and body/corporeality), e.g. you could identify as sexless because you are X0 intersex, have hormonal depletion (hypohormonal or hypogonadism) or sex paraphoria (i.e. indifferent what sex you have).