rattlesnake

noun

rat·​tle·​snake ˈra-tᵊl-ˌsnāk 

: 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

Examples of rattlesnake in a Sentence

Recent Examples on the Web

This abnormally warm March is making the perfect environment for rattlesnakes from the foothills to the delta. —Carmela Karcher, CBS News, 20 Mar. 2026

San Diego County’s nearly week-long heat wave is causing rattlesnakes to become more active and visible, notably in public parks, on trails and near people’s homes, county officials said in a statement. —Gary Robbins, San Diego Union-Tribune, 18 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

As rattlesnake activity increases, awareness is key for hikers, runners and mountain bikers using Orange County’s open space trails. —Cierra Morgan, Los Angeles Times, 13 Mar. 2026

Word History

First Known Use

1624, in the meaning defined above

Phrases Containing rattlesnake

• diamondback rattlesnake
• rattlesnake master
• rattlesnake plantain
• rattlesnake root
• rattlesnake weed
• timber rattlesnake

Rhymes for rattlesnake

• overtake
• shiitake
• undertake
• wapentake
• ache
• ake
• bake
• brake
• break
• cake
• craik
• crake

Kids Definition

rattlesnake

noun

rat·​tle·​snake ˈrat-ᵊl-ˌsnāk 

: 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 

: 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