Phaseolus lunatus, commonly known as the lima bean, is a legume species that is widely cultivated and consumed around the world. In different regions and languages, the lima bean can be referred to by a variety of synonyms. In the United Kingdom and some other English-speaking countries, it is called the butter bean due to its buttery texture and flavor. In other parts of the world, it may be known as the sieva bean, Madagascar bean, or chad bean. Other synonyms for Phaseolus lunatus in various languages include fagiolo di Spagna in Italian, pallar in Peru, and caucho in the Philippines. With its unique taste and versatility in cooking, the lima bean is a staple ingredient in many cuisines and cultures.