The term "yard-long bean" is a common name for a type of green bean that is long and slender. However, there are several synonyms for this vegetable, depending on where you are in the world. In Asia, it is also known as the "long bean" or "snake bean," while in the Caribbean, it is called "asparagus bean." In Africa, it is referred to as "bunga," and in South America, it is known as "china bean." In addition, there are several specific varieties, including the "red noodle bean," "white-seeded yard-long bean," and "purple-podded bean." Regardless of what you call it, these beans are a high-protein, low-calorie addition to any dish.