Pinyin: Gwoyeu Romatzyh: i Cantonese Yale: yāt | Bopomofo: 一 Wade–Giles: i Jyutping: jat1 | |
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Radical 1 meaning "one" is 1 of 6 Kangxi radicals (214 radicals total) composed of 1 stroke.
In the Kangxi Dictionary there are 42 characters (out of 49,030) to be found under this radical.
Radical 1, in this case known as 橫 héng "horizontal", is one of the eight principles of the character 永 (永字八法 Yǒngzì Bāfǎ) which are the basis of Chinese calligraphy.
References
Radical 1 Wikipedia(Text) CC BY-SA