In photonics-talk, a pump is a device that excites atoms in the gain medium of a laser or amplifier. In the case of semiconductor lasers or certain gaz lasers, the pump is directly the electrical current; in most solid-state lasers, some gaz lasers and EDFAs, the pump is light, either incoherent (from a flash lamp) or coherent (from another laser). In chemical lasers, the pump is a chemical reaction, more often exothermic, that produces vibrationally excited molecules.

Climbing slang. References the build up of lactic acid in the forearms.

When climbing steep ground the forearms become distended and the skin tight, with main veins very visible after large amounts of excertion, literally pumped up.

Also seen as pumpy, "That route is way pumpy (dude)" - The route requires a lot of brute strength to ascend. Note that a pumpy route is not automatically technically difficult.

Or pumped, "I couldn't do the crux as i was too pumped" - The climber had run out of strength and was unable to complete the climb. This is also a well worn excuse for not being technically skilled enough to do the climb or too scared to complete the climb.

Pump (p&ucr;mp), n. [Probably so called as being worn for pomp or ornament. See Pomp.]

A low shoe with a thin sole.

<-- MW10 says "close-fitting shoe with moderate to high heel". Usage changed? -->



© Webster 1913.

Pump, n. [Akin to D. pomp, G. pumpe, F. pompe; of unknown origin.]

An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston.

<-- this definition is for a mechanical pump. A peristaltic pump would not fit this def. MW10: "a device that raises, transfers, or compresses fluids . . . by suction or pressure or both." -->

⇒ for various kinds of pumps, see Air pump, Chain pump, and Force pump; also, under Lifting, Plunger, Rotary, etc.

Circulating pump Steam Engine, a pump for driving the condensing water through the casing, or tubes, of a surface condenser. -- Pump brake. See Pump handle, below. -- Pump dale. See Dale. -- Pump gear, the apparatus belonging to a pump. Totten. -- Pump handle, the lever, worked by hand, by which motion is given to the bucket of a pump. -- Pump hood, a semicylindrical appendage covering the upper wheel of a chain pump. -- Pump rod, the rod to which the bucket of a pump is fastened, and which is attached to the brake or handle; the piston rod. -- Pump room, a place or room at a mineral spring where the waters are drawn and drunk. [Eng.] -- Pump spear. Same as Pump rod, above. -- Pump stock, the stationary part, body, or barrel of a pump. -- Pump well. Naut. See Well.<-- vacuum pump, a pump which creates a vacuum by removing gas (usually air) from a container. Mechanical vacuum pump, a vacuum pump operating by the motion of a piston or rotary blade in a chamber, as contrasted with an aspirator. Persistaltic pump, a pump transferring fluids by peristaltic action on a flexible tube. Such pumps are used where a gentle pumping action is desired, or the transferred fluid may be harmed in a mechanical pump; as in the infusion of fluids into blood vessels of the body, or the pumping of explosive or easily decomposed fluids. -->


© Webster 1913.

Pump, v. t. [imp. & p. p. Pumped (p&ucr;mt; 215); p. pr. & vb. n. pumping.]


To raise with a pump, as water or other liquid.


To draw water, or the like, from; to from water by means of a pump; as, they pumped the well dry; to pump a ship.


Figuratively, to draw out or obtain, as secrets or money, by persistent questioning or plying; to question or ply persistently in order to elicit something, as information, money, etc.

But pump not me for politics. Otway.


© Webster 1913.

Pump, v. i.

To work, or raise water, a pump.


© Webster 1913.

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