Prose is language that follows the natural flow or rhythm of speech, ordinary grammatical structures, or, in writing, typical conventions and formatting. Thus, prose ranges from informal speaking to formal academic writing. However, it differs most notably from poetry, in which language is organized by a rhythmic metre, a rhyme scheme, writing formatted in verse, or other more intentionally artistic structures. Ordinary conversational language and many other forms of language fall under prose, a label that can describe both speech and writing. In writing, prose is visually formatted differently than poetry. Poetry is traditionally written in verse: a series of lines on a page, parallel to the way that a person would highlight the structure orally if saying the poem aloud; for example, poetry may end with a rhyme at the end of each line, making the entire work more melodious or memorable. Prose uses writing conventions and formatting that may highlight meaning—for instance, the use of a new paragraph for a new speaker in a novel—but does not follow any special rhythmic or other artistic structure. The word "prose" first appeared 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). In highly-literate cultures where spoken rhetoric is considered relatively unimportant, definitions of prose may be narrower, including only written language (but including written speech or dialogue). In written languages, spoken and written prose usually differ sharply. Sometimes, these differences are transparent to those using the languages; linguists studying extremely literal transcripts for conversation analysis see them, but ordinary language-users are unaware of them. Academic writing (works of philosophy, history, economics, etc.), journalism, and fiction are usually written in prose (excepting verse novels etc.). Developments in twentieth century literature, including free verse, concrete poetry, and prose poetry, have led to the idea of poetry and prose as two ends on a spectrum rather than firmly distinct from each other. The British poet T. S. Eliot noted, whereas "the distinction between verse and prose is clear, the distinction between poetry and prose is obscure." Source: Wikipedia (en)