Noun
A commercially used species of sponge (porifer, invertebrate of the phylum Porifera) found throughout the Mediterranean Sea, Spongia officinalis.
A sponge, made from any material, that is used for cleaning the body while bathing.
Source: en.wiktionary.orgI heard you went to Ireland... I haven't seen it in many years. Is it still green then, and beautiful? Wet as a bath sponge and mud to the knees but, aye, it was green enough. Diana Gabaldon