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sponge,

common name for members of the aquatic animal phylum PoriferaPorifera
[Lat.,=pore bearer], animal phylum consisting of the organisms commonly called sponges. It is the only phylum of the animal subkingdom Parazoa and represents the least evolutionarily advanced group of the animal kingdom.
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, and for the dried, processed skeletons of certain species used to hold water. Over 4,500 living species are known; they are found throughout the world, especially in shallow temperate waters. All are marine except the members of six freshwater families.

Adult sponges are sessile, attaching themselves to rocks, coral, shells, and other substrates. They show so little movement that until the 18th cent. naturalists considered them plants. Most adults are colonial. Sexual reproduction gives rise to a free-swimming larva, which soon settles on a suitable substrate and develops into the adult form. Asexual reproduction also occurs. The individual sponge is saclike in construction; water is drawn into its central cavity through many tiny holes in the body wall and expelled through a large opening at the top of the body. Hard materials of various kinds, depending on the type of sponge, are imbedded in the body wall, forming a skeleton. A colony consists of a mass of many such individuals.

Solitary sponges and colonies range in diameter from about 1-2 in. to 5 ft (1–150 cm) and vary greatly in shape. Some are branched, some more or less globular, and some are thin encrustations on rocks and pilings. Brilliantly colored sponges are common. Bath sponges are the skeletons of certain colonial sponges. These skeletons are composed of a fibrous meshwork of spongin, a material related to horn, and owe their absorbent properties to the fineness of the mesh.

Sponges have been used to hold liquid since ancient times. The ancient Greeks used them for bathing and scrubbing, and Roman soldiers used them for drinking. Commercial sponges, species of the genera Spongia and Hippospongia, are harvested principally in the Mediterranean and Caribbean seas and off the Florida coast. They are brought up by divers in deep water, or raked in with long-handled forks in shallow water. They are left in water until the living tissue rots away; the skeletons are then cleaned and dried and sometimes bleached. Sponge fishing has declined in recent decades due to the use of synthetic sponges and to a decline in the population of commercially valuable natural sponges. The block-shaped sponges now commonly sold are the synthetic product. Dried natural sponges are light gray or brown and irregular in shape.

sponge

[spənj]
(chemical engineering)
Wood shavings coated with iron oxide and used as a catalyst in processes for removing hydrogen sulfide from industrial gases.
(invertebrate zoology)
The common name for members of the phylum Porifera.

sponge

1. any multicellular typically marine animal of the phylum Porifera, usually occurring in complex sessile colonies in which the porous body is supported by a fibrous, calcareous, or siliceous skeletal framework
2. a piece of the light porous highly absorbent elastic skeleton of certain sponges, used in bathing, cleaning, etc.
3. any of a number of light porous elastic materials resembling a sponge
4. porous metal produced by electrolysis or by reducing a metal compound without fusion or sintering and capable of absorbing large quantities of gas

sponge

A special case of a Unix filter that reads its entire input before writing any output; the canonical example is a sort utility. Unlike most filters, a sponge can conveniently overwrite the input file with the output data stream. If a file system has file versioning (as ITS did and VMS does now) the sponge/filter distinction loses its usefulness, because directing filter output would just write a new version.

See also slurp.
References in periodicals archive ?
They took 1500 sponge puddings, applied the lidding film in the development kitchen and then subjected them to full transit tests.
Mr Kipling Raspberry Sponge Puddings (2x95g), Morrisons.
When it came to desserts, sponge pudding was followed by apple crumble and custard, strawberry cheesecake and rice pudding in an online poll commissioned by the Local Authority Caterers Association.
Probably the most famous dessert using rhubarb is crumble and today's recipe can be easily adapted to make it this rather than a sponge pudding.
Angel Delight chocolate dessert contains half a gram of salt in each serving, Marks & Spencer lemon sponge pudding contains 1.
Bridget McCulla, of Jarrow School, Jarrow, was commended for her dessert dish - "Tropical Fruit Trio", a coconut-infused steamed sponge pudding, served with pineapple panna cotta and a warm mango sauce - in the 2014 School Chef of the Year national final.
His three-course menu had a starter of panfried mackerel with Aberdaron crab, cod, cockles and tomato, a main of fillet of Welsh Beef with a mini cottage pie, parsnips, wild mushrooms and horseradish and a dessert of apple and blackberry steamed sponge pudding with blackberry ripple ice cream and Calvados custard.
Sparkhill Foodbank, run by the Charity Narthex, wants milk (UHT or powdered), sugar, fruit juice, pasta sauces, tinned sponge pudding, tinned tomatoes, cereals, tinned rice pudding, tea bags and instant coffee, instant mash potato, rice and pasta, tinned meat and fish, tinned vegetables, tinned fruit, jam, biscuits or snack bars, cooking oil and instant noodles.
laurenlaverne (Lauren Laverne) Dean St Townhouse roast, followed by damson sponge pudding w custard.
On Grand National Day, the Stable menu will be hot smoked salmon with a Nicoise salad, followed by lamb shank with rosemary mash; and finished with Dundee sponge pudding with custard and crme Anglaise.
Especially when Gregg, shockingly, said no to a sponge pudding.