A rime ictionary, rhyme dictionary, or rime book (translated from Chinese 韻書/韵书 pinyin: yùnshū) is an ancient type of Chinese dictionary used for writing poetry or other genre requiring rhymes. It collates characters by rime and tone, instead of radical. However, a Chinese dictionary collated by rime and tone is not necessarily a rime dictionary (Read more about this at Chinese dictionary). Moreover, a rime dictionary should not be confused with a rime table , which charts syllables according to onset and rime grade as well as rime and tone. In this context, the spelling "rime" is often used instead of the more common "rhyme" in order to distinguish between "rime" in the sense of the rhyming portion of a syllable as opposed to the concept of poetic rhyme.