Luffa aegyptiaca (syn. Luffa cylindrica), commonly known as sponge gourd, Egyptian cucumber, or smooth loofah, is a fast-growing vine in the cucurbit family (Cucurbitaceae). The genus name Luffa comes from the Arabic word لوف (lūf), referring to the edible gourd and its fibrous sponge. The species epithet aegyptiaca (“of Egypt”) reflects its early documentation and trade in Egypt, where loofah sponges became widely known in antiquity. It is native to South and Southeast Asia, though the epithet aegyptiaca reflects its early use and cultivation in Egypt and the broader Mediterranean. The immature fruits are widely eaten as a vegetable in South Asian, Southeast Asian, and African cuisines, while the mature fibrous fruits are processed into natural sponges used for bathing, cleaning, and scrubbing.

Historically, Luffa aegyptiaca has served dual roles as a food and utilitarian crop. Young fruits are cooked in curries, stir-fries, soups, and stews across India, Vietnam, China, the Philippines, and West Africa, while the dried fibrous interior of the mature fruit has been used globally as a biodegradable sponge. The plant is also employed in traditional medicine for its expectorant, anti-inflammatory, and purgative properties.