Radical 18
Radical 18 or radical knife meaning "knife" is one of 23 Kangxi radicals composed of 2 strokes.
When appearing at the right side of a Chinese character, it usually transforms into 刂.
In the Kangxi Dictionary, there are 377 characters to be found under this radical.
刀 is also the 22nd indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China. Two associated indexing components, and, are affiliated to the principal indexing component 刀.