luffa

(noun) the dried fibrous part of the fruit of a plant of the genus Luffa; used as a washing sponge or strainer. Synonyms: loofa, loofah, loufah sponge.

(noun) any of several tropical annual climbers having large yellow flowers and edible young fruits; grown commercially for the mature fruit's dried fibrous interior that is used as a sponge. Synonyms: dishcloth gourd, sponge gourd, rag gourd, strainer vine.