septic tank

septic tank

noun
a tank in which solid organic sewage is decomposed and purified by anaerobic bacteria.

Origin:
1900–05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Septic tank is always a great word to know.
So is slumgullion. Does it mean:
a chattering or flighty, light-headed person.
a stew of meat, vegetables, potatoes, etc.
Collins
World English Dictionary
septic tank
 
n
a tank, usually below ground, for containing sewage to be decomposed by anaerobic bacteria

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica
Encyclopedia

septic tank

sewage-disposal unit used principally for single residences not connected to sewer lines. It consists ordinarily of either a single- or double-compartment concrete or steel tank buried in the ground, so arranged that settled sludge is in contact with the waste water as it flows through the tank and thence to a tile drain field. Solids are decomposed by the anaerobic bacterial action of the sludge. After several years the accumulation of sludge interferes with the action, and a scavenger unit must pump the sludge out of the tank for disposal elsewhere.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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