Six different classes, dominated by the Class Nematoda, represent Aschelminthes as a phylum. The nematodes (Nema, thread) or roundworms are ubiquitous small worms that dwarf in numbers all other groups of multicellular animals except insects and mites.n hookworms, the mouth is armed with teeth or cutting plates. Some nematodes are provided with lips, papillae or a leaf crown around the external opening of the mouth. The pharynx (oesophagus) is a strong muscular tube with walls that can contract and expand, creating a pump-like suction mechanism.
Wiktionary(0.00 / 0 votes)Rate this definition: squad(Noun) A group of people organized for some common purpose, usually of about ten members. squad(Noun) A unit of tactical military personnel, or of police officers, usually of about ten members.
The modern Suicide Squad is an antihero strike team of incarcerated, death row supervillains; acting as deniable, covert assets of the United States government, it undertakes high-risk, black ops missions in exchange for commuted prison sentences.