plas·mod·ro·ma \plazˈmädrəmə\noun plural Usage: capitalized Etymology: New Latin, from plasm- + -droma (from Greek -dromos -drome) : a subphylum of Protozoa comprising the classes Mastigophora, Sarcodina, and Sporozoa and characterized by absence of cilia and possession of nuclei of one kind only — compare ciliophora