masculine/feminine...

in linguistics, 

GENDER

‘Gender’ was originally used to classify nouns. Gender is now also used to distinguish between male and female behavior: ‘gender identity’ (self awareness that one is either a male or a female), ‘gender role’ (the image that an individual presents to others based on culturally defined concepts of masculinity and femininity), ‘gender specific’ (of or limited to either males or females, e.g. eyes and hair colour are not gender specific), and ‘gender gap’ (the apparent disparity between men and women in values, attitudes, voting patterns, etc.).