n. A naked human skull as the emblem of death; the head of the conventional personification of death. [ 1913 Webster ]

I had rather be married to a death's-head with a bone in his mouth. Shak. [ 1913 Webster ]

Death's-head moth (Zool.), a very large European moth (Acherontia atropos), so called from a figure resembling a human skull on the back of the thorax; -- called also death's-head sphinx. [ 1913 Webster ]