v. i. [ From Curd. ] [ Sometimes written crudle and cruddle. ]1. To change into curd; to coagulate; as, rennet causes milk to curdle. Thomson. [ 1913 Webster ]
2. To thicken; to congeal. [ 1913 Webster ]
Then Mary could feel her heart's blood curdle cold. Southey. [ 1913 Webster ]
v. t. [ imp. & p. p. Curdled p. pr. & vb. n. Curdling ]1. To change into curd; to cause to coagulate. “To curdle whites of eggs” Boyle. [ 1913 Webster ]
2. To congeal or thicken. [ 1913 Webster ]
My chill blood is curdled in my veins. Dryden. [ 1913 Webster ]