Phthiraptera is a scientific name for a class of parasitic insects commonly known as lice. There are many synonyms for this word, which can be confusing for those who are not familiar with entomological nomenclature. Some of the most commonly used synonyms for Phthiraptera include Anoplura, Pediculidae, Pediculina, Pediculoida, and Siphunculata. Each of these terms refers to the same group of insects that feed on the blood of humans and other animals. Despite their small size, lice are a persistent problem for many people, and finding effective ways to control infestations is an ongoing area of research and development.