The term derives from the Latin: androgynus, derived from Ancient Greek: ἀνδρόγυνος, from ἀνήρ, stem ἀνδρ- (anér, andr-, meaning man) and γυνή (gunē, gyné, meaning woman).
Being androgynous is interesting, unusual, confusing, extremely desirable in the modelling world.
Here are some faces, purely for the 'look book' of it all to contemplate on what androgynous might look like to you:
It's not about guessing which ones are male and which ones are female, It's about enjoying the process of deduction that leads you to that conclusion.
Analysing their facial features, concentrating on the exact point where the scale is tipped into a more feminine/masculine arena and why that is so is the beauty of concentrating on a divine androgynous face.