Polyphyodonty is a term used in the field of dentistry to describe animals that continuously grow and replace their teeth throughout their lifetime. Synonyms for polyphyodonty include pleurodonty, thecodonty, and diphyodonty. Pleurodonty refers to animals that have teeth attached to the sides of their jawbone, while thecodonty describes animals that have teeth that are embedded in sockets in their jawbone. Diphyodonty is a type of polyphyodonty found in mammals that have two sets of teeth in their lifetime, namely deciduous teeth and permanent teeth. Understanding these synonyms is crucial in the study of dental anatomy and evolutionary biology.