The act or process of making something sour (acidifying), or changing into anacid.
2013 October 3, Roger Harrabin, “Health of oceans 'declining fast'”, inbbc.co.uk[1], retrieved2013-10-05:
Coral reefs, for instance, are suffering from the higher temperatures and the effects ofacidification whilst also being weakened by bad fishing practices, pollution, siltation and toxic algal blooms.
