plural of hump yard

(rail transport) a classification yard or marshalling yard which has a hump over which trains are shunted, the vehicles then running on their own by gravity into various sidings.

(Britain) (usually) a single-arch bridge with steep approaches on either side

plural of humpback bridge

The application of psychological and physiological principles to the engineering and design of products, processes, and systems, so as to reduce human error, increase productivity, and enhance safety and comfort.

plural of hummingbird hawkmoth

Any of various sphingid moths of the genus Macroglossum, especially Macroglossum stellatarum, which, like hummingbirds, hover in front of flowers to feed.

(Of a landscape, ecosystem, etc.) having been altered from its natural state by human activity to the point where the natural element is not as prominent as the human alterations.

plural of human roulette wheel

Synonym of devil's wheel (“amusement ride”)