rattlesnake

noun

rat·​tle·​snake ˈra-tᵊl-ˌsnāk How to pronounce rattlesnake (audio)
Synonyms of rattlesnakenext
: any of several American pit vipers (genera Crotalus and Sistrurus) that have horny interlocking joints at the end of the tail which make a sharp rattling sound when shaken

Illustration of rattlesnake

Illustration of rattlesnake

Examples of rattlesnake 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.
Bailey Vanden Bossche's ankle after she was bitten by a rattlesnake. Jasmine Viel, CBS News, 4 Apr. 2026 This year, the unusually warm weather in March, plant abundance and a healthy amount of prey were early signals to rattlesnakes to begin their activity. Karen Garcia, Los Angeles Times, 1 Apr. 2026 The way the wildflowers bloomed along the North County hillside, the rush of the creek along the trail — and even my encounter with a rattlesnake — all made for a special hiking experience. Maura Fox, San Diego Union-Tribune, 20 Mar. 2026 In June, when the surface temperatures of the rock deep inside the abyss can claw toward 170 degrees — hot enough to kill a rattlesnake caught in the open in a few minutes — the Kaibab offers a cool reprieve. New York Times, 16 Mar. 2026 See All Example Sentences for rattlesnake

Word History

First Known Use

1624, in the meaning defined above

Time Traveler
The first known use of rattlesnake was in 1624

Browse Nearby Words

Cite this Entry

“Rattlesnake.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rattlesnake. Accessed 6 Apr. 2026.

Kids Definition

rattlesnake

noun
rat·​tle·​snake ˈrat-ᵊl-ˌsnāk How to pronounce rattlesnake (audio)
: any of various poisonous American snakes with a rattle at the end of the tail

Medical Definition

rattlesnake

noun
rat·​tle·​snake ˈrat-ᵊl-ˌsnāk How to pronounce rattlesnake (audio)
: any of the American pit vipers that have a series of horny interlocking joints at the end of the tail which make a sharp rattling sound when vibrated and that comprise the genera Sistrurus and Crotalus see diamondback rattlesnake, tiger rattlesnake, timber rattlesnake
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