1. 爬行的;爬行动物的
A reptilian creature is a reptile.
2. 像爬行动物的;有爬行动物特征的
You can also use the word reptilian to describe something that is characteristic of a reptile or that is like a reptile.
1. any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms
Synonym: reptile