Definition

1. Adjective:

   • Of or relating to the class Reptilia: Pertaining to reptiles, a class of cold-blooded, air-breathing vertebrates that typically have scales or bony plates and lay eggs.
   • Suggestive of a reptile; characterized by cunning, coldness, or stealth: Used figuratively to describe behavior or qualities considered low, base, or sneaky.

2. Noun:

   • Any cold-blooded vertebrate of the class Reptilia: An animal belonging to this class, such as a snake, lizard, turtle, tortoise, crocodile, or alligator, including extinct forms like dinosaurs.

Usage Examples

• Adjective:
  • The museum has an excellent collection of reptilian fossils. (The museum's fossils are related to reptiles.)
  • His reptilian cunning allowed him to manipulate the situation. (His cunning was suggestive of a reptile's nature.)
• Noun:
  • Crocodiles and iguanas are both reptilians. (Crocodiles and iguanas are members of the class Reptilia.)
  • The study focused on the evolution of early reptilians. (The research was about early vertebrate animals of the reptile class.)

Advanced Usage

• Figurative Use (Adjective): Often used in literary or critical contexts to describe human behavior perceived as primitive, cold-blooded, self-serving, or lacking in higher emotions.
  • The dictator's reptilian gaze betrayed no empathy. (The dictator's gaze was cold and unfeeling, like that of a reptile.)
• Scientific Context: Used in zoology and paleontology to classify and discuss animals within the reptilian lineage.
  • The reptilian brain refers to the oldest part of the vertebrate brain, governing basic instincts.

Variants and Related Words

• Reptile (n): The more common term for an animal of the class Reptilia.
  • Snakes and lizards are reptiles.
• Herpetology (n): The branch of zoology concerned with the study of reptiles and amphibians.
  • She is studying herpetology to become a reptile expert.

Synonyms

• Adjective (literal): Herpetological (related to the study of reptiles).
• Adjective (figurative): Cold-blooded, cunning, sly, treacherous.
• Noun: Reptile.

Antonyms

• Adjective (figurative): Warm-hearted, compassionate, noble.
• Noun (biological class): Mammal, avian (bird).

Adjective

1. of or relating to the class Reptilia

Noun

1. any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms