The word "crossopterygii" refers to a group of fish known for their unique features. Here's an easy breakdown:
Crossopterygii (pronounced as kros-oh-PTER-ih-jee-eye) is a noun that describes a type of fish that has paired fins that look like limbs. These fish are important because they are considered ancestors of amphibians (animals that can live both in water and on land, like frogs).
Crossopterygii is a scientific term for a group of fish with limb-like fins, important for understanding the evolution of amphibians.