Definition

Noun: 1. A venomous American snake: A rattlesnake is a type of poisonous snake found in the Americas. It is a pit viper, meaning it has special heat-sensing pits on its head to locate prey. 2. Characterized by a rattle: Its most distinctive feature is a series of hollow, interlocking segments made of keratin at the end of its tail. When shaken, these segments produce a buzzing or rattling sound as a warning.

Usage and Examples

• The rattlesnake uses its rattle to warn potential threats before striking.
• Hikers should watch their step to avoid disturbing a rattlesnake.
• The sound of a rattlesnake is unmistakable and serves as a critical safety signal.

Advanced Usage

• "To be as dangerous as a rattlesnake": Used to describe a person or situation that is deceptively calm but very hazardous.
  • Be careful negotiating with him; he's as dangerous as a rattlesnake.
• In herpetology (the study of reptiles and amphibians), the term rattlesnake specifically refers to snakes in the genera and .

Variants and Related Words

• Rattler (noun): A common informal synonym for rattlesnake.
  • We saw a big rattler sunning itself on the rock.
• Rattle (noun): The sound-making structure at the end of the snake's tail. This is a separate word but is the source of the compound name "rattlesnake."
• Pit viper (noun): The broader biological family (Viperidae, subfamily Crotalinae) to which rattlesnakes belong.

Synonyms

• Crotalid (technical): A member of the pit viper family Crotalidae.
• Serpent (literary/formal): A general term for a snake.

Related Phrases and Idioms

• "To shake like a rattlesnake": To tremble violently, often from fear or cold.
  • After the scare, his hands were shaking like a rattlesnake.
• "A rattlesnake in the grass": A variation of "snake in the grass," meaning a hidden danger or a treacherous person.
  • He pretended to be a friend, but he was a real rattlesnake in the grass.

Noun

1. pit viper with horny segments at the end of the tail that rattle when shaken