Meaning

noun the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)

originInherited from Middle English phisonomie, from Anglo-Norman phisenomie, Middle French phisonomie et al., ultimately from Late Latin physiognomia, from Ancient Greek φυσιογνωμία (phusiognōmía, “physiology”), from φύσις (phúsis, “physique, appearance”) + γνώμη (gnṓmē, “means of knowing”). Middle English phisonomie would regularly develop into *physnomy /ˈfɪznəmi/ (forms of this type are common in…

Etymology from Wiktionary, CC BY-SA 3.0