Sponge

Name:
Sponge
Detailed information:
(1) Metal: a finely divided and porous form of metal such as iron, platinum, or titanium. May be used in sponge form as a catalyst or pressed into metal ingots. (2) Plastic: cellular plastic, foam, rubber sponge. (3) Natural: siliceous cells of the Porifera group of sessile sea animals.