reptilian
Americanadjective
-
belonging or pertaining to the Reptilia.
-
groveling, debased, or despicable; contemptible.
-
mean; treacherous; harmful.
noun
adjective
-
of, relating to, resembling, or characteristic of reptiles
-
mean or treacherous; contemptible
reptilian behaviour
noun
Etymology
Origin of reptilian
1840–50; < New Latin Reptili ( a ) reptiles (plural of rēptile, neuter of Late Latin rēptilis; see reptile) + -an
Explanation
Use the adjective reptilian to describe a reptile: your pet iguana, while also sweet and possibly cuddly, is definitely reptilian. Crocodiles, lizards, and turtles are all reptiles, and you can therefore describe all of them as reptilian. A reptilian animal is not a mammal or a bird, and it is most likely cold-blooded and egg laying. You can also use the word reptilian to describe something — or someone — that reminds you of a reptile. The Latin root is reptilis, which means "creeping or crawling."
Vocabulary lists containing reptilian
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Animal Adjectives
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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.
Penn appeared as a reptilian lawyer in the 1993 thriller "Carlito's Way," before saying he was retiring from acting to direct, and making 1995's "The Crossing Guard" with Jack Nicholson and Anjelica Huston.
From Barron's • Mar. 16, 2026
The species of crocodylomorph roamed Earth about 215 million years ago during the Triassic period and is believed to have been a fast-moving, land-dwelling predator resembling a "reptilian greyhound".
From BBC • Feb. 17, 2026
The jawbone looked reptilian but had teeth resembling those of dinosaurs.
From Science Daily • Nov. 15, 2025
The “Punch-Drunk Love” actor and comedian on Wednesday shared a playful tribute honoring his reptilian co-star who died Sunday of old age at a gator farm in southern Colorado.
From Los Angeles Times • May 15, 2025
His sometimes heavy-lidded, almost reptilian expression vanished; his eyes lit up, his arms would windmill, and his voice rise.
From "Geeks: How Two Lost Boys Rode the Internet Out of Idaho" by Jon Katz
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
