Rime dictionary

A rime dictionary, rhyme dictionary, or rime book is an ancient type of Chinese dictionary used for writing poetry or other genre requiring rhymes. It collates s by and , instead of . However, a Chinese dictionary collated by rime and tone is not necessarily a rime dictionary . Moreover, a rime dictionary should not be confused with a rime table, which charts syllables according to 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.



Historical records suggest that the earliest rime dictionary is one called ''Shenglei'' by Li Deng of the Three Kingdoms period. However, the book did not survive. The first extant rime dictionary is ''Qieyun'' from the Sui Dynasty. The later ''Guangyun'' and ''Jiyun'' are based on ''Qieyun''. These rime dictionaries reflect the phonology of Middle Chinese.

In a rime dictionary, characters are first divided into four groups according to their tone names. Traditionally the group of the "level tone" occupies two ''juan'' as it contains more characters. Within each of the four tonal groups, characters are further divided into differet sub-groups according to their rimes. These sub-groups are called ''yun'' or ''yunmu'' or less frequently ''yunbu'' . Characters within each ''yun'' have the same tone and similar rime. In the case of ''Guangyun'', the slight difference is due to the presence or absence of the . For example, characters within the 東 ''yun'' all have the "level tone", and either the rime or the rime .

A rime dictionary primarily serves the composition of s . Versifiers rhyme a poem according to the standard rime book , not the sounds of their own dialect or those of the "mandarin" spoken at their time. For many generations of Chinese versifiers, the standard work to consult is the so-called ''Pingshuiyun'' first compiled during the , a simplified version of ''Guangyun'' which reduced the 206 ''yun'' into 106, reflecting the contemporary pronunciations.



Unlike a rhyming dictionary in the West, a Chinese rime dictionary also provides meanings and other lexical information - anything that helps to make a poem. The pronunciation in a rime dictionary is marked by ''fanqie''.