Hippospongia lachne, a marine sponge.

Any species of the class Hexactinellida of sponges, which have a skeleton made of four- and/or six-pointed siliceous spicules.

plural of sponge bag

(UK, Australia) A bag for carrying toiletries, as when travelling.

Any of many sponges, of the class Sclerospongiae, that have a massive skeleton made of calcium carbonate

A porous, grayish-black form of platinum.

(cooking) To leaven a small mass of flour, to be used in leavening a larger quantity.

A fine and soft variety of commercial sponges (Spongia officinalis).

plural of bath sponge

A commercially used species of sponge (porifer, invertebrate of the phylum Porifera) found throughout the Mediterranean Sea, Spongia officinalis.