Refers to a style and a period in evidence approximately from the 1520s to 1590, developing chiefly in Rome and spreading elsewhere in Europe. The style is characterized by a distancing from the Classical ideal of the Renaissance to create a sense of fantasy, experimentation with color and materials, and a new human form of elongated, pallid, exaggerated elegance.

Source: Art & Architecture Thesaurus

http://vocab.getty.edu/page/aat/300021144