noun
- small bones or cartilages that support the fins of fish
Usage: anatomy; zoology
Examples
- The radialia provide structural support to the fish’s pectoral fins.
- Marine biologists studied the radialia in various shark species.
- The radialia are arranged in rows within the fin structure.
- Damage to the radialia can affect a fish’s swimming ability.
- The fossil showed well-preserved radialia from an ancient fish.