刃又稱刀刃、刀鋒、刀口[1],是工具、武器、刀或機器當中用來刺穿、劈砍、切割或刮擦物體的那一部分[2][3][4]。對於刀來說,刀較鋒利的那個邊緣就是刀刃。刀刃通常要用比刀本身更硬的材料製成。刀刃一般由燧石、黑曜岩、銅、青銅、鐵、鋼、陶瓷器等材料製成。
參考文獻
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