Why are alligators and crocodiles called reptile?

Crocodiles (subfamily Crocodylinae) or true crocodiles are large aquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. Crocodylinae, all of whose members are consideredtrue crocodiles, is classified as a biological subfamily. A broader sense of the term crocodile, Crocodylidae that includes Tomistoma, is notused in this article. The term crocodile here applies only to thespecies within the subfamily of Crocodylinae. The term is sometimesused even more loosely to include all extant members of the order Crocodilia, which includesTomistoma,the alligators and caimans (family Alligatoridae), the gharials (family Gavialidae), and all other living and fossil Crocodylomorpha.