Pronunciation: /krɒˌsɒptəˈrɪdʒiən/
noun A type of lobe-finned fish that includes the ancestors of land vertebrates
A1 A crossopterygian is a type of fish that lived millions of years ago.
A2 Some scientists believe that the crossopterygian is an ancestor of modern-day fish.
B1 The discovery of a fossilized crossopterygian provided valuable information about prehistoric marine life.
B2 Researchers are studying the anatomy of the crossopterygian to better understand its evolutionary significance.
C1 The crossopterygian is known for its unique features that set it apart from other ancient fish species.
C2 Paleontologists have uncovered new evidence that suggests the crossopterygian played a crucial role in the evolution of vertebrates.
formal The crossopterygian fish is known for its unique lobe fins.
informal Have you ever heard of a crossopterygian fish? It's pretty cool.
slang That crossopterygian fish is one funky-looking creature.
figurative Her ideas were like crossopterygian fossils, ancient yet still relevant.
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