The rhymes of a sonnet are arranged according to a certain rhyme scheme. Generally, sonnets are divided into different groups according to the rhyme scheme that follows. It has a specific rhyme scheme, and a specific volta, or twist. In poetry, a sonnet has 14 lines and is written in iambic pentameter.
The word sonnet is derived from the Italian word 'sonetto', which means 'little song' or small print.