death's-head - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

• death's head

death's-head (plural death's-heads)

1. A human skull, as symbol of death.

   • 1952, Ivanhoe‎^[1], archived from the original on 2018-08-21:

     To the confusion and confounding of that cursed death's-head knight.

2. A kind of hawk moth with pale markings on the back of the thorax somewhat like a skull.

• memento mori
• Jolly Roger
• skull and crossbones