Babies usually respond negatively to sourness too by wrinkling their noses, blinking, and pursing their lips.

FORBES: How Food Companies Carry Out Sensory Consumer Research On Kids And Babies

Four basic taste sensations are recognised by our taste buds - bitterness, sourness, sweetness and saltiness.

BBC: Is there really a north-south water taste divide?

But there's sourness too, around the mouth, as if he can't dispel the taste of his own bile.

CNN: Review: Cooper brilliant in OK 'Breach'

Yet, despite such election-time sourness between partners, it is still possible that the present coalition might hang on.

ECONOMIST: Austria

Sourness is not associated with water, but bitterness, for example, can be caused by magnesium chloride and calcium chloride.

BBC: Is there really a north-south water taste divide?

Suddenly I knew what she wanted to do, and with that thought the sourness of the coffee rose in my throat.

NEWYORKER: The Slows

Get it right and the dessert is light and spongy, the sourness of the cherries perfectly offsetting the sweetness of the cream.

BBC: The king of Kuchen in Black Forest, Germany

Mr. Curcio suggests that Ford's sourness began during World War I, when he suddenly felt an impulse to preach to the masses.

WSJ: Book Review: I Invented the Modern Age | Henry Ford

Oh, the misanthropy and sourness.

BBC: News | NEWSNIGHT | Jonathan Franzen interview transcript