Chocolate is poisonous to dogs. This species of spider is extremely poisonous.

Recent Examples on the Web

Vets Now, a veterinary and pet health website, says that palm oil alone is generally not poisonous, but international law allows crews to dump the substance at sea, which can mix with boat fuel and other potentially hazardous materials. Austen Erblat, sun-sentinel.com, "Mystery substance found at Fort Lauderdale beach. Paramedics worry it could make dogs ill.," 3 Sep. 2020

Russian doctors on Monday claimed two laboratories found no poisonous substances in his system. Greg Norman, Fox News, "Russian opposition critic Alexei Navalny in critical condition as doctor claims no outside interference in treatment," 24 Aug. 2020

Russian doctors on Monday said two laboratories found no poisonous substances in his system. Associated Press, San Diego Union-Tribune, "German hospital: Poisoning signs found in Russian dissident," 24 Aug. 2020

Zoom topics ranged from an Animal Costume Class, a Robotics Simulator, a guest Veterinarian presenting on poisonous plants, to ‘how-to’ videos. Melanie Savage, courant.com, "4-H Club holds virtual fair this year," 17 Aug. 2020

Art allows researchers to trace the paths traveled by such foods as tomatoes, which were feared to be poisonous during the 16th century but became a staple in 19th-century Italian kitchens. Theresa Machemer, Smithsonian Magazine, "Centuries-Old Paintings Help Researchers Track Food Evolution," 23 July 2020

All poisonous and venomous animals are prohibited, with the exception of live scorpions, provided those scorpions are intended for use in medical research or the production of antivenin. Washington Post, "Chicks, cockroaches, crickets and frogs: How mail delays are affecting the live animal trade," 22 Aug. 2020

Flight from superfires, poisonous air, tainted water, and now other contagions, has become our way of life. Yxta Maya Murray, Longreads, "Fire/Flood: A Southern California Pastoral," 19 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'poisonous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.