Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
“The erect posture allowing more efficient and faster movement on land appeared only in their therapsid descendants.”
Source: https://gizmodo.com/trace-fossils-reveal-how-extinct-animals-really-lived-1850227579