Radical 37

Radical 37 or radical big (大部) meaning "big" or "very" is one of the 31 Kangxi radicals (214 radicals total) composed of three strokes.

In the Kangxi Dictionary, there are 132 characters (out of 49,030) to be found under this radical.

大 is also the 33rd indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China.

Sinogram
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. It is a first grade kanji.