noun plural.
Books or other writings dealing with unusual, especially pornographic, topics.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
books on strange or unusual subjects (especially erotica)
Word Usage
"In hardly any of Scott's poetry do we find much of what is called the curiosa felicitas of expression, ” the magic use of words, as distinguished from the mere general effect of vigour, purity, and concentration of purpose."