pulvillus
/pʌlˈvɪləs/noun
Entomology. A pad or lobe beneath the claws of certain insects, especially dipterans, which assists in adhering to surfaces.
Origin
Late Middle English (in an earlier sense). From Middle French pulville pledget and its etymon classical Latin pulvillus small cushion, in post-classical Latin also pledget, in scientific Latin also in entomological use from pulvīnus cushion + -ulus.