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Elsan

British  
/ ˈɛlsæn /

noun

  1. a type of portable lavatory in which chemicals are used to kill bacteria and deodorize the sludge

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Elsan

C20: from the initials of E. L. Jackson, the manufacturer + san ( itation )