dorsum,
back the back of the body of a vertebrate or any analogous surface (as the upper or outer surface of an organ or appendage or part); "the dorsum of the foot"
compartment a partitioned section, chamber, or separate room within a larger enclosed area
auto,
automobile,
motorcar,
car,
machine a motor vehicle with four wheels; usually propelled by an internal combustion engine; "he needs a car to get to work"
trunk -
The luggage storage compartment of a sedan/saloon style car.
trunk -
A circuit between telephone switchboards or other switching equipment.
trunk -
A chute or conduit, or a watertight shaft connecting two or more decks.
trunk -
In software projects under source control: the most current source tree, from which the latest unstable builds so-called "trunk builds" are compiled.
trunk -
A main line in a river, canal, railroad, or highway system.