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poison
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References & Edit History Quick Facts & Related Topics
Images & Videos
poisonous mushrooms
Learn why the presence of Theobromine molecule in chocolates is toxic to dogs
blue-ringed octopus absorption, distribution, and excretion of toxicants toxicant accumulation in target organs
Ask an expert: What makes something poisonous?
dose-response curve
How new beaver dams might damage the environment
blue-ringed octopus ergot
For Students
fly agaric
poison summary
Quizzes
A Yorkshire terrier dressed up as a veterinarian or doctor on a white background. (dogs)
A Visit with the Word Doctor: Medical Vocabulary Quiz
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
44 Questions from Britannica’s Most Popular Health and Medicine Quizzes
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Urtica dioica, often called common nettle or stinging nettle
7 Dangerous Plants You Should Never Touch
Female meadow adder snake (Vipera ursinii) Also called meadow viper or Ursini's viper. Reptile venomous poisonous tongue
What’s the Difference Between Venomous and Poisonous?
Young sportswoman resting after running, sweat
Can You Really Sweat Out Toxins?
Discover
New York NY/ USA- November 23, 2018 Hordes of shoppers throng the Macy's Herald Square flagship store in New York looking for bargains on the day after Thanksgiving, Black Friday.
Why Is It Called Black Friday?
Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.
10 Famous Artworks by Leonardo da Vinci
Super Typhoon Noru over the western tropical Pacific Ocean as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA Aqua satellite July 31 2017
What Is the Difference Between a Typhoon and a Super Typhoon?
The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)
11 Banned Books Through Time
Mayer Amschel Rothschild (1744-1855), founder of the house of Rothschild; lithograph by Friedrich Lieder, c. 1830.
Where Do Anti-Semitic Conspiracy Theories About the Rothschild Family Come From?
Woman tied to a ducking stool, a method of punishment by means of humiliation, beating, or death. (cucking stool)
8 Unusual Punishments Inflicted on Women Throughout History
Iraqi Army Soldiers from the 9th Mechanized Division learning to operate and maintain M1A1 Abrams Main Battle Tanks at Besmaya Combat Training Center, Baghdad, Iraq, 2011. Military training. Iraq war. U.S. Army
8 Deadliest Wars of the 21st Century

poison: Media

biochemistry
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Videos

poisonous mushrooms
Poisonous mushrooms.
Video: © American Chemical Society (A Britannica Publishing Partner)
Learn why the presence of Theobromine molecule in chocolates is toxic to dogs
Why chocolate is bad for dogs.
Video: © American Chemical Society (A Britannica Publishing Partner)
Ask an expert: What makes something poisonous?
Understanding the correlation between the type of poison and the amount required...
Video: © American Chemical Society (A Britannica Publishing Partner)
How new beaver dams might damage the environment
Learn about a toxic downside to restoration of beaver habitat: a temporary spike...
Video: © American Chemical Society (A Britannica Publishing Partner)
The difference between “poisonous” and “venomous”
Bite or be bitten.
Video: Encyclopædia Britannica, Inc.

Images

blue-ringed octopus
The venomous blue-ringed octopus (genus Hapalochlaena) is small but deadly,...
© MikaelEriksson/iStock.com
absorption, distribution, and excretion of toxicants
Figure 1: Routes of absorption, distribution, and excretion of toxicants in the human...
Encyclopædia Britannica, Inc.
toxicant accumulation in target organs
Figure 2: Accumulation of toxicants in the target organ during repetitive exposures.
Encyclopædia Britannica, Inc.
dose-response curve
Figure 3: Dose–response curves.
Encyclopædia Britannica, Inc.
blue-ringed octopus
The blue-ringed octopus (genus Hapalochlaena) is known for displaying blue...
© Sascha Janson/Shutterstock.com
ergot
Ergot, a fungal disease of cereal grasses, is caused by the fungus Claviceps...
Walter Dawn
alkaloid
Chemical structures of the well-known alkaloids morphine, quinine, nicotine, strychnine,...
Encyclopædia Britannica, Inc.
Ionizing radiation injury from atomic bomb
Photograph of a woman's skin burned in the pattern of the kimono she was wearing...
National Archives and Records Administration/Department of Defense
fly agaric
The fly agaric (Amanita muscaria) is a poisonous fungus.
Sven Samelius
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