A horny, sulfur-containing protein, related to keratin, that forms the skeletal structure of certain classes of sponges. A proteinaceous compound of which the spicules in Demospongiae are composed.

plural of spongin

present participle of sponge

The application of a sponge.

(historical) A place of temporary confinement for debtors, kept by a bailiff, where debtors were sponged of all money they had on themselves, before being transferred to debtor's prison.

The property of being spongy.

plural of sponging-house

plural of sponging

(UK, historical) A bailiff's or other house in which debtors are put before being taken to jail, or until they compromise with their creditors. At these houses extortionate charges were commonly made for food, lodging, etc.

plural of sponging house