Kangxi radicals

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The Kangxi radicals (Chinese: 康熙部首; pinyin: Kāngxī bùshǒu), also known as Zihui radicals, are a set of 214 radicals that were collated in the 18th-century Kangxi Dictionary to aid categorization of Chinese characters. They are primarily sorted by stroke count. They are the most popular system of radicals for dictionaries that order characters by radical and stroke count. They are encoded in Unicode alongside other CJK characters, under the block "Kangxi radicals", while graphical variants are included in the block "CJK Radicals Supplement".

Originally introduced in the 1615 Zihui, they are more commonly referred to in relation to the 1716 Kangxi Dictionary—Kangxi being the commissioning emperor's era name. The 1915 encyclopedic word dictionary Ciyuan also used this system. In modern times, many dictionaries that list Traditional Chinese head characters continue to use this system, for example the Wang Li Character Dictionary of Ancient Chinese (2000). The system of 214 Kangxi radicals is based on the older system of 540 radicals used in the Han-era Shuowen Jiezi. Since 2009, the Chinese Government has promoted a 201-radical system (Table of Han Character Radicals) called the Table of Indexing Chinese Character Components, as a national standard for use with simplified character forms.

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The Kangxi dictionary lists a total of 47,035 characters divided among the 214 radicals, for an average of 220 characters per radical; however, the distribution is unequal, with the median number of characters per radical being 64, the maximum number being 1,902 (for radical 140 艸), and the minimum being 5 (for radical 138 艮). The radicals have between one and 17 strokes, with a median of 5 strokes and an average of slightly below 5.7 strokes.

The ten radicals with the largest number of characters account for 10,665 characters (or 23% of the dictionary). The same ten radicals account for 7,141 out of the 20,992 characters (34%) in the Unicode CJK Unified Ideographs block as it was introduced in 1992, as follows:

Modern Chinese dictionaries continue to use the Kangxi radical-stroke order, both in traditional zìdiǎn (字典, lit. "character/logograph dictionary") for written Chinese characters and modern cídiǎn (詞典 "word/phrase dictionary") for spoken expressions. The 214 Kangxi radicals act as a de facto standard, which may not be duplicated exactly in every Chinese dictionary, but which few dictionary compilers can afford to completely ignore. The number of radicals may be reduced in modern practical dictionaries, as some of the more obscure Kangxi radicals do not form any characters that remain in frequent use. Thus, the Oxford Concise English–Chinese Dictionary, for example, has 188 radicals. The Xinhua Zidian, a pocket-sized character dictionary containing about 13,000 characters, uses 189 radicals, later increased to 201 in its tenth edition to conform to the national standard. A few dictionaries also introduce new radicals, treating groups of radicals that are used together in many different characters as a kind of radical. For example, Hanyu Da Cidian, the most inclusive available Chinese dictionary (published in 1993) has 23,000 head character entries organized by a novel system of 200 radicals.

In Unicode version 3.0 (1999), a separate Kangxi Radicals block was introduced which encodes the 214 radicals in sequence, at U+2F00–2FD5. These are specific code points intended to represent the radical qua radical, as opposed to the character consisting of the unaugmented radical; thus, U+2F00 represents radical 1 while U+4E00 represents the character yī meaning "one". In addition, the CJK Radicals Supplement block (2E80–2EFF) was introduced, encoding alternative (often positional) forms taken by Kangxi radicals as they appear within specific characters. For example, ⺁ "CJK RADICAL CLIFF" (U+2E81) is a variant of ⼚ radical 27 (U+2F1A), itself identical in shape to the character consisting of unaugmented radical 27, 厂 "cliff" (U+5382).

Wikimedia Commons has media related to Kangxi radicals.

Wikimedia Commons has media related to Chinese radicals.

• List of Shuowen Jiezi radicals
• List of radicals in Unicode
  • Unicode chart – Kangxi Radicals (above)
  • Unicode chart – CJK Radicals Supplement
• Table of Indexing Chinese Character Components (aka List of Xinhua Zidian radicals) – 189 radicals
• List of Japanese radicals
• Section headers of a Chinese dictionary
• CJK Unified Ideographs
• Ideographic Description Sequences

• An Analysis of the Two Chinese Radical Systems, Journal of the Chinese Language Teachers Association, 13, 2, 95–109, May 78

Look up Index:Chinese radical in Wiktionary, the free dictionary.

• Simplified Chinese characters with English definitions, grouped by radicals
• Table of the 214 radicals in the unicode project
• List of radicals in home-printable A4 layout (archived copy at the Wayback Machine)
• List of 214 Japanese radicals and exceptions to Kangxi, searchable and grouped by stroke number
• Tangorin, search Japanese kanji using the 214 Kangxi radicals (archived copy at the Wayback Machine)
• Chinese characters by radical
• List of Radicals, meaning and naming with Japanese.
• Chinese etymology search radicals and receive the meaning as well as illustrations of radicals in history