A projecting or terminal part of a structure, object, or machine; (in later use chiefly) spec. a mechanical part which resembles an arm in shape…

Any small, rounded part of an implement, device, or piece of equipment.

The moving parts of a mill or other piece of machinery. Also in plural in same sense.

A device for releasing part of a mechanism. Obsolete. rare.

Mechanics. A ring, circle, flange, or perforated disk, surrounding a rod, shaft, pipe, etc., for restraining lateral motion; forming a steam-tight…

The head or top of a drum-shaped component of something, esp. a capstan.

An arm of a machine or other object that is long, or longer than another arm.

In various specific applications. A cylinder or barrel round which a belt passes or a rope, chain, etc., is wound, as in a winch.

A cloth used in a press to cover or protect the thing pressed, to strain a pressed extract, or to aid and equalize compression.

A part of a machine that contains a (detachable) tool or device for performing a particular action, as cutting, grinding, etc.; the tool or…

A container of liquid designed to absorb gas or vapour passed into it, as in some refrigerators and condensers.

a plate, typically made of metal, which transfers and redistributes the weight of a component or structural element.

Any terminal flat or flattish member of a mechanical structure, as the face of an anvil.

In plural and (less commonly) singular. A bush or bearing in which an axle rotates; spec. one in a ship's pump. Cf. bush, n.3 1.

A container in which something is squeezed or compressed and which forms part of a larger apparatus.

Mechanics. A machine part that causes two different but complementary actions to occur alternately, or that undergoes two different actions…

In various specific and technical applications: as, the ‘pillow’ used in making bone-lace; a receptacle for pins, a pincushion, n.; †an ink-pad for…

A tooth of a saw.

Something resembling a shoe (sense 1 or 4) in shape, position, or function. A kind of drag or skid for a wheel of a vehicle; also the concave part of…

Originally: the set of keys on a typewriter, typesetting machine, switchboard, etc.; (later also) the panel of keys used to enter text or other…

A person who or (less commonly) device which returns a thing †or person.

Any beam across the top of a piece of mechanism.

a shoe having a groove cut around the edge of the sole, into which the seam joining the sole and upper is sunk; frequently in English channel shoe.

A device which is used for basting or holding together several layers of fabric. Cf. baste, v.1 Only in appositive compounds (typically with…

A port (port, n.3 5) through which water may enter or leave a pump, engine, etc.

Mechanics. A contrivance used for shifting. In many applications, e.g. a kind of clutch serving to transfer a belt from one pulley to another; also…

A store of essential supplies in a machine or apparatus, or the compartment or receptacle in which these supplies are contained.

In various types of machine, device, or apparatus: an aperture permitting influx of a substance, entrance of a source of energy, introduction of an…

Part of a tire-shortening machine.

Mechanics. A kinematic chain of which one link is fixed or stationary.

That which taps or lightly strikes, as a hammer for striking a bell; spec. a key in an electric telegraph which is depressed (with a tapping…

(a) (see quot. 1879); (b) a metal bar used to apply pressure or exert tension.

In a sewing machine: a device or an attachment used to make buttonholes.

A device in a machine for tightening a band, rope, conveyor belt, etc.

A rotating helical screw, forming part of a machine or mechanical arrangement and used to move material. A helical screw used to force material…

a panel of a switchboard or a surface of a device, into which instruments are installed; (now chiefly) a surface on which instrument gauges or…

Something which helps to preserve the balance; spec. the knobbed filaments (haltēres or poisers), which in two-winged flies replace the posterior…

a bar that is subject to torque; spec. one in the suspension of some motor vehicles, fixed to the frame at one end and the wheel assembly at the…

(An attachment forming) the operative part of an appliance (esp. a vacuum cleaner or shower) which either has its own power source or is…