Pulvillus

Part of speech: noun

Definitions

1. A small, often cushion-like structure located on the toe pads of insects and some other arthropods, aiding in adhesion to surfaces
2. A specialized pad found in certain insects, serving as an adhesive mechanism to facilitate walking on smooth surfaces
3. A distinct, soft-bodied appendage on the feet of some arthropods that enhances their ability to grip and climb various substrates

Etymology: The insect foot pad called a pulvillus takes its name from a simple Latin diminutive: "pulvillus" means "a little cushion," formed from "pulvinus," a cushion or pillow. The name is apt, since the structure is a small soft, fleshy pad at the tip of each leg, located between the claws, that lets an insect grip smooth surfaces. Pulvilli usually occur in pairs, one under each claw, and they are often covered in fine hairs that secrete a sticky fluid. That combination of softness and adhesion explains why a cushion-like name suited an anatomical feature that, to the eye, looks like a little tuft or pillow rather than a tool for climbing.

Synonyms: pad, cushion, footpad