Radical 5 or radical second (乙部), meaning "second", is one of 6 of the 214 Kangxi radicals that are composed of only one stroke. However, this radical is mainly used to categorize miscellaneous characters otherwise not belonging to any radical, mainly featuring a hook or fold, and 乙 is the character with the fewest strokes.
In the Kangxi Dictionary, there are 42 characters (out of 49,030) to be found under this radical.
In mainland China, 乙 along with other 14 associated indexing components, including 乚, etc., are affiliated to a new radical 乛 (乛部), which is the 5th principal indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries.[1] Usually, only several out of the 15 variant components are listed under radical 乛 in dictionary indexes.
In the Unihan Database, 亀 (Japanese simplified form of 龜) falls under Radical 5 + 10 strokes, while other variants of 龜 (including Simplified Chinese 龟) fall under Radical 213 (龜 "turtle"), causing an inconsistency. However, in most Japanese dictionaries, 亀 is treated as a variant of Radical 213 (龜) and indexed Radical 213 + 0 strokes.
Sinogram
As an independent character it is a Jōyō kanji, or a kanji used in writing the Japanese language. It is a secondary school kanji.[2] It is also used in the Chinese language.
It means "secondary" and is mainly used in compounds.
Fazzioli, Edoardo (1987). Chinese calligraphy : from pictograph to ideogram : the history of 214 essential Chinese/Japanese characters. calligraphy by Rebecca Hon Ko. New York: Abbeville Press. ISBN0-89659-774-1.
Leyi, Li (1993). Tracing the Roots of Chinese Characters: 500 Cases. Beijing. ISBN978-7-5619-0204-2.{{cite book}}: CS1 maint: location missing publisher (link)
GF 0011-2009 Table of Indexing Chinese Character Components prescribes 201 principle indexing components and 100 associated indexing components (in brackets) used in Simplified Chinese. Not all associated indexing components are listed above.