What's the noun for physiognomy? Here's the word you're looking for.
physiognomy
The art or pseudoscience of deducing the predominanttemper and other characteristic qualities of the mind from the outward appearance, especially from the features of the face.
“But this woman has committed to memory all the essentials of her own physiognomy, and can conjure up, time and again, her own basic likeness without resorting to a mirror.”
“The science of physiognomy was of particular importance to the ancient Greeks.”
“There is no doubt that Charles Darwin was sceptical about the claims of physiognomy with regard to expression and emotion.”