1. plural of pinna; the external parts of the ears
Usage: anatomy
2. plural of pinna; the leaflets of a compound leaf
Usage: botany

Examples

• The doctor examined the patient’s pinnas for signs of infection.
• Damage to the pinnas can affect hearing ability.
• The fern’s pinnas were arranged in a delicate pattern.
• Each pinna on the compound leaf had serrated edges.
• The botanist counted the pinnas on each frond.
• Cold weather can cause the pinnas to become red and painful.