What does "grasshopper" mean?

Grasshopper: In ordinary square or upright pianos of London make, the escapement lever or jack, so made that it can be taken out and replaced with the key; -- called also the hopper. Grove. Grasshopper engine, a steam engine having a working beam with its fulcrum at one end, the steam cylinder at the other end, and the connecting rod at an intermediate point. -- Grasshopper lobster (Zoöl.) a young lobster. [Local, U. S.] -- Grasshopper warbler (Zoöl.), cricket bird.