kanji 'side' radical (radical 91) at left
Refers to the radical 片 when it appears on the left side of a kanji, as in 版 or 牒.
The left part of the kanji 版 is called 片偏.
The name 片偏 is a compound of 片 (かた, 'side') and 偏 (へん, 'left-side radical'), describing its position in kanji structure.