skulls and crossbones

A form of skull and crossbones — A depiction of a human skull and two crossed femurs (thighbones), a symbol of death traditionally used on the Jolly Roger pirate flag, but now used on chemical containers and other hazardous items as an indicator of warning of toxicity or other life-threatening dangers or risks.

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Meanings

noun

alternative skulls-and-crossbones

  1. pluralplural of skull and crossbones
Cite this entry
APA

skulls and crossbones. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/skulls%20and%20crossbones

MLA

“skulls and crossbones.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/skulls%20and%20crossbones. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “skulls and crossbones,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/skulls%20and%20crossbones.

Source: skulls and crossbones on Wiktionary, CC BY-SA 4.0.