thumbless

noun

1. the short, thick digit of the human hand that is nearest the wrist and is opposable to the other fingers
2. a corresponding part in some other vertebrate animals
3. the part of a glove or mitten that covers the thumb
4. Archit. ovolo

transitive verb

1. to handle, turn, soil, or wear with or as with the thumb
2. Informal to solicit or get (a ride) or make (one's way) in hitchhiking by gesturing with the thumb extended in the direction one is traveling