This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A flow of fluid in the opposite direction of its regular flow.

n. The flow of a fluid (through a pipe etc) in a direction opposite to that which is normal or intended

n. a flow that returns toward its source

"Joe the Plumber, who found his name repeated again and again by Barack Obama and John McCain during one of the 2008 presidential debates, has somehow bubbled up, like some kind of backflow, into the debate over Proposition B, the ballot measure to bring commonsense standards to large-scale dog breeding operations in the largest of the puppy mill states."

flowing    flow   

regurgitation   

semilunar    composted    nonbattle    solenoid-operated    tricuspid    ultra-precision    derichment    pharmacologic    defrost    feculent