curdling

Verb

curdle (third-person singular simple present curdles, present participle curdling, simple past and past participle curdled)

1. (ambitransitive) To form curds so that it no longer flows smoothly; to cause to form such curds. (usually said of milk)
   • Too much lemon will curdle the milk in your tea.

   Synonyms:

   curd

2. (ambitransitive) To clot or coagulate; to cause to congeal, such as through cold. (metaphorically of blood)
   • "Vich Ian Vohr," it said, in a voice that made my very blood curdle, "beware of to-morrow!"1814 July 7, [Walter Scott], Waverley; or, ’Tis Sixty Years Since. […], volume (please specify |volume=I to III), Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co.; London...
3. (transitive) To cause a liquid to spoil and form clumps so that it no longer flows smoothly.
   • It is enough,' said the agitated Mr. Slurk, pacing to and fro, 'to curdle the ink in one's pen, and induce one to abandon their cause for ever.'1836 March – 1837 October, Charles Dickens, “(please specify the chapter name)”, in The Posthumous Papers of the Pickwick Club, London: Chapman and Hall, […], published 1837, →OCLC