Top definition
An ancient, amphibious tetrapod, four-limbed vertebrates such as amphibians, who was the first fish to crawl out on land. They pre-date the first tetrapods by over ten million years. It might be a common ancestor of many different species of animals, including humans. This species is also commonly known as the fishapod.
The tiktaalik was a revolutionary discovery in the scientific community.
by MePhone4 June 01, 2017
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