·vt To congeal or thicken.
II. Curdle ·vt To change into curd; to cause to coagulate.
III. Curdle ·vi To Thicken; to Congeal.
IV. Curdle ·vi To change into curd; to Coagulate; as, rennet causes milk to curdle.
a churn-staff. N. ...
A glossary of provincial and local words used in England by Francis Grose