sponge means: It is a thick yeast batter which is left to ferment, and then becomes a soft, fluffy consistency. The yeast batter is mixed with the other ingredients and formed into a dough. This sponge gives the bread an ethereal flavor. (in Cooking Dictionary)

What else does sponge mean?

A portion of bread that contains all or part yeast. To which the rest of the ingredients are added. (in Cooking Dictionary)

A variety of aquatic invertebrate species, the majority of which are marine-filtering, of the phylum Porifera. They have a porous structure made of siliceous, calcareous, fibrous, and sometimes form colonies that attach to underwater surfaces. (in Merlin Dictionary)

One piece of absorbent skeleton from certain organisms or one piece of plastic, which is comparable in absorbency. It can be used to clean, bathe, and for other purposes. (in Merlin Dictionary)

As a raw material for manufacturing, metal in porous and brittle forms. (in Merlin Dictionary)

Use a gauze pad to absorb fluids and blood, such as during surgery or dressing a wound. (in Merlin Dictionary)

This small, absorbent contraceptive pad contains spermicide. It is used to protect the cervix and uterus from sexual incontinence. (in Merlin Dictionary)

Lettered dough (in Merlin Dictionary)

Light cakes, like sponge cake. (in Merlin Dictionary)

A person who is dependent on others to provide their own support. (in Merlin Dictionary)

Person who consumes large quantities of alcohol. (in Merlin Dictionary)

Wipe or use a sponge to moisten. (in Merlin Dictionary)

Use a sponge, cloth or other absorbent material to remove the substance. (in Merlin Dictionary)

Use a sponge to apply the cream. (in Merlin Dictionary)

You can get free stuff by beggaring or freeloading. (in Merlin Dictionary)