Cougar is a slang term that refers to a woman who seeks sexual relations with considerably younger men.
zona - (anatomy) any encircling or beltlike structure zone anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; he has good bone structure
Oona is a feminine given name. It is an Anglicisation of the Irish-language name Ãna. Apart from Ireland, it is also a popular name in Finland. A variant spelling of Oona is Oonagh.