Definition

Noun: * Sour milk: Milk that has undergone natural souring or fermentation due to the action of lactic acid bacteria, resulting in a tart or acidic taste and often a thicker consistency. It is not necessarily spoiled but is intentionally cultured or has been allowed to sour.

Usage

"Sour milk" is used as a non-count noun to describe the general substance. It refers to milk that is intentionally soured for culinary use (like in baking) or milk that has accidentally soured but is still usable.

Examples

• Noun:
  • The recipe for the soda bread calls for a cup of sour milk.
  • Don't throw that out; slightly sour milk is perfect for making pancakes.
  • The smell indicated the milk had turned into sour milk.

Advanced Usage

• "to go/turn sour": This is the primary verbal phrase used to describe the process of milk becoming sour.
  • If you leave the milk out of the refrigerator, it will go sour.

Variants and Related Words

• Soured milk (n.): A less common variant with the same meaning as "sour milk."
• Clabber (n.): A regional term, especially in the Southern US, for thick, naturally curdled sour milk.
• Cultured buttermilk (n.): A commercially produced, consistently fermented dairy product, which is the modern equivalent most often used when a recipe calls for "sour milk."

Synonyms

• Curdled milk: Emphasizes the separated, lumpy state that often accompanies souring.
• Fermented milk: A more scientific term focusing on the process.

Notes on Meaning

• Culinary vs. Spoiled: In cooking, "sour milk" often implies a product that is still safe and useful for baking, where its acidity reacts with baking soda. This is distinct from spoiled milk or rancid milk, which has undergone further decomposition, has an offensive odor, and is unsafe to consume.

Noun

1. milk that has turned sour