The action of "curd"; curdling, coagulation; an instance of this.
Late Middle English; earliest use found in John Trevisa (c1342–?1402), translator. From curd + -ing.
That curds or curdles; that thickens, clots, or coagulates; that forms or is formed from curds.
Mid 18th century; earliest use found in William Ellis (c1700–1758), agriculturist and writer. From curd + -ing.