Plastrons are a protective plate or shield that covers the chest or abdomen of an animal. In the animal kingdom, plastrons are an important body part for defense, and are found in turtles, tortoises, and crabs. Synonyms for plastrons include protective covering, carapace, armor, shell, shield, and breastplate. These words are used to describe a physical barrier or protection for an animal and are often used interchangeably. In humans, plastrons can refer to a type of fencing gear that covers the torso and provides protection for the athlete during a fencing match. Regardless of the context, plastrons are important for the safety and survival of animals, and for the protection of athletes.