Which part of the fruit is specifically defined as zest?

Zest refers specifically to the outer colored layer of the skin of citrus fruits, and it is obtained by scraping or grating that outer layer. This zest contains essential oils that provide intense flavor and aroma, making it a popular ingredient in various culinary applications. The vibrant and fragrant quality of the zest adds complexity to dishes, enhancing both sweet and savory recipes.

Other parts of the fruit, such as the pulp, seeds, or juice, serve different culinary purposes but do not encompass the definition of zest. The pulp is the fleshy interior, the seeds are the reproductive part, and the juice is the liquid extracted from the fruit, all of which are distinct from the flavorful outer layer used specifically for zest.