noun
kanji 'enter' radical at top (radical 11)
Refers to the kanji radical ⼊ (radical 11) when it appears at the top of a character, such as in 入 or 全. The name literally means 'entering roof'. Compare with 入り頭 (いりがしら), which is used when the radical is at the head of a character.
See also: 入り頭
「入」の部首は「入り屋根」と呼ばれることがある。
The radical of 入 is sometimes called 入り屋根.
漢字辞典で「入り屋根」を
If you look up 入り屋根 in a kanji dictionary, you can see a list of characters with this radical.
入り頭 is used when radical 11 is at the head (top) of a character, while 入り屋根 specifically refers to it being at the top as a 'roof'. In practice, they are often interchangeable, but 入り屋根 emphasizes the roof-like shape.
Compound of 入り (いり, 'entering') + 屋根 (やね, 'roof'), describing the shape of the radical as a roof that one enters under. The exact historical origin of the name is uncertain.