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rattlesnake

American  
[rat-l-sneyk] / ˈræt lˌsneɪk /

noun

rattlesnakes plural
  1. any of several New World pit vipers of the genera Crotalus and Sistrurus, having a rattle composed of a series of horny, interlocking elements at the end of the tail.


rattlesnake British  
/ ˈrætəlˌsneɪk /

noun

  1. any of the venomous New World snakes constituting the genera Crotalus and Sistrurus , such as C. horridus ( black or timber rattlesnake ): family Crotalidae (pit vipers). They have a series of loose horny segments on the tail that are vibrated to produce a buzzing or whirring sound

"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

Other Word Forms

Noun Inflected Forms

Etymology

Origin of rattlesnake

An Americanism dating back to 1620–30; rattle 1 + snake

Compare meaning

How does rattlesnake compare to similar and commonly confused words? Explore the most common comparisons:

Explanation

A rattlesnake is a long, venomous reptile with a tail that shakes, making a sound like a maraca, before it bites. When you're camping in the Arizona desert, you'll want to keep an eye out for rattlesnakes. Rattlesnakes get their name from the rattle at the end of their tails that's composed of rattling pieces of keratin, the same kind of protein found in your fingernails. In order to scare off predators, rattlesnakes noisily vibrate their tails, warning that they're ready to strike. While these snakes cause most snake bites in the U.S., they only attack if they're feeling threatened, and rattlesnake bites aren't deadly if they're treated right away.

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Hayes emphasized that a bite from any rattlesnake remains a medical emergency and requires immediate medical attention.

From Science Daily Jul. 10, 2026

Christopher Gadsden’s coiled rattlesnake “Don’t Tread On Me” flag from 1775 symbolized that fight for freedom: Don’t tell me what to do.

From The Wall Street Journal Jun. 28, 2026

The midtempo “Ridin’ High” starts with a descending harp glissando that pours into a synthesizer seasoned by a vibraslap’s rattlesnake hiss.

From The Wall Street Journal May 25, 2026

On average, the agency receives between 290 and 390 reports of rattlesnake bites annually.

From Los Angeles Times May 1, 2026

I would rather look a Texas rattlesnake in the eye.

From "Life Is So Good" by George Dawson

Beyond influencing how people respond to snake encounters, the researchers say the myth has also affected how rattlesnakes are treated.

From Science Daily Jul. 10, 2026

"In addition, pygmy rattlesnakes were expected to have an increased prevalence of Ro, as they primarily consume lizards and frogs which are known to transmit the parasite."

From Science Daily May 26, 2026

Fourteen of the 34 rattlesnakes carried the parasite.

From Science Daily May 26, 2026

The odds of run-ins between outdoor enthusiasts and rattlesnakes have increased as people have hit the trails these last two months.

From Los Angeles Times May 1, 2026

Snuffy greeted them with the openhearted good humor and warmth he usually reserved for rattlesnakes, gila monsters, and the bubonic plague.

From "The Milagro Beanfield War" by John Nichols

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