Definition of float in the AudioEnglish.org Dictionary. Meaning of float. What does float mean? Proper usage and pronunciation (in phonetic transcription) of the word float. Information about float in the AudioEnglish.org dictionary, synonyms and antonyms.
Mammals evolved from a group of mammal-like reptiles called the Synapsids, specifically the Therapsids, in the Triassic period, around 250 million years ago.
A reptile is an air-breathing animal that has scales instead of hair or feathers. Reptiles have lived on Earth for more than 280 million years. Scientists consider them to be the ancestors of birds and mammals.