noun
- plural of pereion; the thoracic segments of a crustacean (such as a lobster or crab) that bear walking legs.
Usage: zoology; technical term used in the study of crustacean anatomy
Examples
- The pereions of the crab are the segments between the head and the abdomen.
- Crustaceans use their pereions to support and move their bodies.
- The researcher examined the pereions under a microscope to identify the species.
- Each pereion typically bears a pair of walking legs in most decapod crustaceans.