1. the larval stage of parasitic flatworms (flukes) that develops in intermediate hosts and is capable of infecting the final host
Usage: biology; parasitology; plural form

Examples

• The metacercariae were found encysted in the muscle tissue of infected fish.
• Scientists studied the metacercariae to understand the parasite’s life cycle.
• The metacercariae remain dormant until consumed by the definitive host.
• Proper cooking temperatures can kill metacercariae in contaminated seafood.
• The researcher identified metacercariae under the microscope.
• Metacercariae represent a critical stage in fluke development.