GNU Collaborative International Dictionary of English

Found one definition

1.       
   Curdle, v. t. [imp. & p. p. Curdled (-d'ld); p. pr. & vb. n. Curdling (-dlĭng).]
   1. To change into curd; to cause to coagulate. “To curdle whites of eggs”  Boyle.
   
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   2. To congeal or thicken.
   
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   My chill blood is curdled in my veins. Dryden.
   
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