The term 'spherical legume' refers to a type of plant that produces edible seeds, such as peas. The crossword solutions for this term are 'PEA, ' which is a three-letter word. Peas are a type of legume that are round in shape and are often used in cooking. They are a popular source of protein and are also high in fiber, vitamins, and minerals. Peas are a versatile ingredient that can be used in a variety of dishes, from soups and stews to salads and side dishes.