Prose
The word "prose" first appears in English in the 14th century. It is derived from the Old French "prose", which in turn originates in the Latin expression "prosa oratio" (literally, straightforward or direct speech).
Literature
Poetry is a form of literary art which uses the aesthetic qualities of language (including music, and rhythm) to evoke meanings beyond a prose paraphrase. Poetry has traditionally been distinguished from prose by its being set in verse; prose is cast in sentences, poetry in lines; the syntax of prose is dictated by meaning, whereas that of poetry is held across meter or the visual aspects of the poem. This distinction is complicated by various hybrid forms such as the prose poem and prosimetrum, and more generally by the fact that prose possesses rhythm. Abram Lipsky refers to it as an "open secret" that "prose is not distinguished from poetry by lack of rhythm".