You searched for: “skulls and crossbones
skull and crossbones (s) (noun), skulls and crossbones (pl)
A picture of a human skull situated above two crossed bones: This image of a skull and crossbones was used on pirates' flags as a symbol of death; however, it is sometimes currently used as a "warning label" on poisons; so, avoid, or stay away, from anything that uses such pictures!

This information about skulls and crossbones, which is utilizing the pictures, will NOT cause you any harm!

An image once used by pirates on their flags.
These images are used as warnings for poisons or other deadly things.
This entry is located in the following unit: English Words in Action, Group S (page 7)