Pisanosaurus is a genus of herbivorous dinosaur that lived during the Late Triassic period. It is one of the earliest known dinosaurs, and its fossils have been found in Argentina. While there aren't many synonyms for the word "pisanosaurus," there are a few related terms that could be of interest to those studying this dinosaur. For example, some scientists refer to pisanosaurs as "basal sauropodomorphs," which means they are primitive relatives of the sauropodomorphs, a group of long-necked dinosaurs that includes giants like Brachiosaurus and Diplodocus. Other related terms include "prosauropods" and "sauropodomorph precursors," which also describe early members of this dinosaur lineage.