notched edge（齿刃）是什么意思？音标发音+图解场景

齿刃 /ˈnəʊz ˈlɛðə/ n

English: notched edge · 齿刃

释义：Blade with an edge that has a row of teeth; it is used to cut hair in points.

这个词出现在以下图解场景（1）