Radical 80 or radical do not (毋部) meaning "mother" or "do not" is one of the 34 Kangxi radicals (214 radicals in total) composed of 4 strokes. Chinese characters with a similar component 母 "mother" may also be classified under this radical.
In the Kangxi Dictionary, there are 16 characters (out of 49,030) to be found under this radical.
The radical is also used as an independent Chinese character. It is one of the Kyōiku kanji or Kanji taught in elementary school in Japan.[1] It is a second grade kanji[1]
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.
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.