1. of, relating to, or resembling a fish or fishes
Usage: formal or technical; rare in everyday usage
2. of or relating to a piscina (a basin or pool in a church)
Usage: ecclesiastical; archaic

Examples

• The piscinal characteristics of the creature made it well-suited to aquatic life.
• Medieval churches often featured a piscinal basin for ritual ablutions.
• Scientists studied the piscinal anatomy of various species.
• The piscinal features of the fossil suggested it was an early fish.
• The priest maintained the piscinal drain with care.