La Blason

The term forms the root of the modern words "emblazon", which means to celebrate or adorn with heraldic markings, and "blazoner", one who emblazons. The terms "blason", "blasonner", "blasonneur" were used in 16th-century French literature by poets who, following Clément Marot in 1536, practised a genre of poems that praised a woman by singling out different parts of her body and finding appropriate metaphors to compare them with. It is still being used with that meaning in literature and especially in poetry. One famous example of such a celebratory poem, ironically rejecting each proposed stock metaphor, is William Shakespeare's Sonnet 130:

My mistress' eyes are nothing like the sun; Coral is far more red than her lips' red; If snow be white, why then her breasts are dun; If hairs be wires, black wires grow on her head. I have seen roses damasked, red and white, But no such roses see I in her cheeks, And in some perfumes is there more delight Than in the breath that from my mistress reeks. I love to hear her speak, yet well I know, That music hath a far more pleasing sound. I grant I never saw a goddess go; My mistress when she walks treads on the ground. And yet, by heaven, I think my love as rare As any she belied with false compare.

en.wikipedia.org/wiki/Blason