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skull and crossbones

noun
1.
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.
Origin
1820-1830
1820-30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for skull and cross bones

skull and crossbones

noun
1.
a picture of the human skull above two crossed thighbones, formerly on the pirate flag, now used as a warning of danger or death
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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skull and cross bones in Medicine

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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skull and cross bones in Culture

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.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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9
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