Brachiate

Brachiate: The M-W word of the day for 7/13/09. Brachiate shares its etymology with brace and bracelet and refers to arms. A brachiated plant has lots of branches, while a brachiating monkey travels through the brachiated trees swinging by its arms.

Halrloprillalar's people must be closer to their brachiating past than Earth's people.

A Book for Today: Ringworld Engineers by Larry Niven