Curl (kûrl), n. [Akin to D. krul, Dan. krölle. See Curl, v.] 1. A ringlet, especially of hair; anything of a spiral or winding form.
Under a coronet, his flowing hair
In curls on either cheek played.
Milton.
2. An undulating or waving line or streak in any substance, as wood, glass, etc.; flexure; sinuosity.
If the glass of the prisms... be without those numberless waves or curls which usually arise from the sand holes.
Sir I. Newton.
3. A disease in potatoes, in which the leaves, at their first appearance, seem curled and shrunken.
Blue curls. (Bot.) See under Blue.