| a representation of a front view of a human skull above two crossed bones, originally used on pirates' flags and now used as a warning sign, as in designating substances as poisons. |
| skull and crossbones n. pl. skulls and crossbones A representation of a human skull above two long crossed bones, a symbol of death once used by pirates and now used as a warning label on poisons. |
A picture or outline of a human skull and two crossed arm or leg bones. Pirate ships are supposed to have used the skull and crossbones on their flags. (See also Jolly Roger.)
skull and crossbones n. pl. skulls and crossbones
A representation of a human skull above two long crossed bones, a symbol of death used as a warning label on poisons.
