ETYM Dan. kam comb, ridge; or cf. W., Gael., and Irish, cam bent. Related to Comb.
Part of a machine that converts circular motion to linear motion or vice versa. The edge cam in an automobile engine is in the form of a rounded projection on a shaft, the camshaft. When the camshaft turns, the cams press against linkages (plungers or followers) that open the valves in the cylinders.
A face cam is a disc with a groove in its face, in which the follower travels. A cylindrical cam carries angled parallel grooves, which impart a to-and-fro motion to the follower when it rotates.
Shaped rotating disk to convert circular into linear motion. + prikaži više

ETYM Old Fren. creste, French cręte, Latin crista.
1. The top line of a hill, mountain, or wave.
2. A showy growth of e.g. feathers or skin on the head of a bird or other animal.
3. (Heraldry) In medieval times, used to decorate a helmet.

ETYM Old Eng. hil, hul, AS. hyll; akin to OD. hille, hil, Latin collis, and prob. to Eng. haulm, holm, and column. Related to Holm.
A local and well-defined elevation of the land.