[{"Bold_text": "noun", "List Items": ["a heavy iron block with a smooth face, frequently of steel, on which metals, usually heated until soft, are hammered into desired shapes.", "anything having a similar form or use.", "the fixed jaw in certain measuring instruments.", "Also calledanvil cloud,.Meteorology. incus(def2) incus(def2).", "a musical percussion instrument having steel bars that are struck with a wooden or metal beater.", "Anatomy. incus(def1) incus(def1)."]}]