http://www.transstudent.org/gender
Definitions:
Gender Identity: Gender Identity: One’s internal sense of being male, female, neither of these, both, or another gender(s). Everyone has a gender identity, including you. For transgender people, their sex assigned at birth and their own internal sense of gender identity are not the same. Female, woman, and girl and male, man, and boy are also NOT necessarily linked to each other but are just six common gender identities.
Gender Expression/Presentation: The physical manifestation of one’s gender identity through clothing, hairstyle, voice, body shape, etc. Most transgender people seek to make their gender expression (how they look) match their gender identity (who they are), rather than their sex assigned at birth.
Sex Assigned at Birth: The assignment and classification of people as male, female, intersex, or another sex based on a combination of anatomy, hormones, chromosomes. It is important we don’t simply use “sex” because of the vagueness of the definition of sex and its place in transphobia. Chromosomes are frequently used to determine sex from prenatal karyotyping (although not as often as genitalia). Chromosomes do not determine genitalia.
Sexually Attracted To: Sexual Orientation. It is important to note that sexual and romantic/emotional attraction can be from a variety of factors including but not limited to gender identity, gender expression/presentation, and sex assigned at birth.
Romantically/Emotionally Attracted To: Romantic/emotional orientation. It is important to note that sexual and romantic/emotional attraction can be from a variety of factors including but not limited to gender identity, gender expression/presentation, and sex assigned at birth.