Pronunciation: /ækˈtɪnɒptəraɪ/
noun a taxonomic group of ray-finned fishes characterized by the bony rays in their fins
A1 Actinopteri are a group of fish with ray-finned fins.
A2 Actinopteri include a wide variety of fish species found in freshwater and saltwater.
B1 The actinopteri have bony rays supporting their fins, distinguishing them from other types of fish.
B2 Actinopteri are known for their diverse adaptations to different aquatic environments.
C1 The actinopteri subclass is one of the most successful and diverse groups of vertebrates.
C2 Researchers study the evolutionary history of actinopteri to understand the development of modern fish species.
formal Actinopteri is a class of ray-finned fish that includes most of the familiar fish species.
informal I heard actinopteri are the most diverse group of fish out there.
slang Those actinopteri fish are really cool to look at.
figurative The actinopteri swam gracefully through the water, like a synchronized dance.
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