<human>:  What is the difference between a lime and a lemon?
<bot>: The primary difference between a lime and a lemon is their size and taste. Limes are typically smaller, have a more rounded shape, and have a stronger, more tart flavor than lemons. Lemons have a bright yellow color, are oblong-shaped, and have a sweeter and more mild flavor. Nutritionally, limes and lemons are similar, as they are both good sources of vitamin C.