death cap

noun

: a very poisonous mushroom (Amanita phalloides) of deciduous woods of North America and Europe that varies in color from pure white to olive or yellow and has a prominent volva at the base

called also death cup

Examples of death cap in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Initial symptoms — which tend to appear within six to 24 hours of ingesting a death cap — can include watery diarrhea, nausea, vomiting, abdominal pain, and dehydration, the state health department said. Jakob Rodgers, Mercury News, 15 Jan. 2026 The California Department of Public Health is advising people to avoid picking and eating wild mushrooms during this high-risk season, as death cap mushrooms are abundant across the Northern California and the Central Coast regions. Noe Padilla, USA Today, 15 Jan. 2026 Officials speculated that heavy rains this winter are producing more death cap mushrooms than normal, particularly in Northern California. Don Sweeney, Sacbee.com, 14 Jan. 2026 The toxin in death cap mushrooms, called amatoxin, can damage the kidneys, liver and gastrointestinal tract if ingested. Aria Bendix, NBC news, 10 Jan. 2026 Wet weather, especially around hardwood trees like oaks and pines, creates optimal conditions for deadly mushrooms such as the death cap to proliferate. Hollie Silverman, MSNBC Newsweek, 7 Dec. 2025 The announcement detailed how local hospitals had reported an increase in cases of people eating poisonous wild mushrooms—which varieties like the death angel, death cap and fly amanita grow in California in fall, late winter and spring. Sabrina Weiss, PEOPLE, 4 Dec. 2025 However, unlike death cap mushrooms and destroying angels, many of the toxins found in Amanita muscaria are water-soluble and can be removed by parboiling them prior to cooking or by other means. Matt Kasson, Popular Science, 15 Oct. 2025 During her 10-week trial, the jury heard that Patterson had seen the location of the death cap mushrooms posted on a citizen science website. Hilary Whiteman, CNN Money, 8 Sep. 2025

Word History

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of death cap was in 1925

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Cite this Entry

“Death cap.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/death%20cap. Accessed 19 Jan. 2026.

Kids Definition

death cap

noun
: a very poisonous mushroom that varies in color from pure white to olive to yellow and has an obvious swollen covering about the base

called also death cup

Medical Definition

death cap

noun
: a very poisonous mushroom of the genus Amanita (A. phalloides) of deciduous woods of North America and Europe that varies in color from pure white to olive or yellow and has a prominent volva at the base

called also death cup

see thioctic acid
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