Also found in: Idioms.
A2OApples to Oranges
A2OAdelaide to Outback (Australia)
A2OAccess to Opportunities (young women's support program; UK)
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References in periodicals archive ?
Du, "Succession of bacterial community in anaerobic-anoxic-aerobic (A2O) bioreactor using sludge fermentation liquid as carbon source," Desalination and Water Treatment, vol.
Alpha 2 Omega Fitness client Edmund Washington remarked, "A2O program is one of the best by far.