(entertainment) A curved mirror, often using convex and concave sections to achieve a distorted effect; a popular attraction at carnivals and fairs.

A sharp, pointy object, such as a sliver or splinter. / A bur; a seed pod with sharp features that stick in fur or clothing. / A small piece of material left on an edge after a cutting operation.

(climbing) A device, used to clip on a rope, that tightens when weight is applied, thus allowing the rope to be climbed.

In a nociceptive manner (by means of nociception)