The horny, projecting structure forming the mandibles of a bird, especially one that is strong, sharp, and useful in striking and tearing; a bill.

• 鸟喙，鸟嘴构成鸟嘴上下喙的角质突出结构，尤指坚硬、锋利且有撕扯、刺穿之功用；鸟喙，鸟嘴