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
a picture of the human skull above two crossed thighbones, formerly on the pirate flag, now used as a warning of danger or death

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.

skull and crossbones definition

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.)


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