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Entries starting with R

443 entries.

reel

A device consisting of radial arms with horizontal stats, connected with a harvesting machine, for holding the stalks of grain in position to be cut by the knives.

refarming

The abolition of existing band allocations in the radio spectrum and the more efficient reallocation of the spectrum into smaller bands.

reformer

A device used to convert petroleum refinery naphthas, typically having low octane ratings, into high-octane liquid products called reformates.

refractory metal

A metal, such as molybdenum or tungsten, with a high refraction, and hence a high melting point.

regain

The amount of width a woven cloth grows by when the fibers swell, used to determine the width of the reed to use in weaving.

regenerated

adjectiveManufacturing

Reprecipitated after chemical treatment, especially in the form of fibres; pertaining to fibres prepared in this way.

regenerative furnace

A furnace having a regenerator in which gas used for fuel, and air for supporting combustion, are heated; a Siemens furnace.

reglet

A strip of wood or metal of the height of a quadrat, used for regulating the space between pages in a chase, and also for spacing out title pages and other open matter.

regrate

To remove the outer surface of, as of an old hewn stone, so as to give it a fresh appearance.

regrowing

The self-cultivation of vegetables by city dwellers, using flower pots and windowsills, growing them from roots, cuttings, and scraps, for recycling and sustainable living.

rehab

A brief period of time spent away from the fire by a firefighter at a fire scene, for purposes of recuperation.

rejoint

to fill up the joints of, as stones in buildings when the mortar has been dislodged by age and the action of the weather.

relay

An electrical actuator that allows a relatively small electrical voltage or current to control a larger voltage or current.

release

In the block system, a printed card conveying information and instructions to be used at intermediate sidings without telegraphic stations.

release time

The amount of time elapsed between the moment when the actuating time for release commences and the moment when the braking force ceases.

relish

In a wooden frame: the projection or shoulder around, or at the side of, a tenon (“projecting member made to insert into a mortise”), used to strengthen a mortise-and-tenon joint.

reluctor

A toothed ring or wheel that rotates past a variable reluctance sensor.

rendezvous

A set of orbital maneuvers during which two spacecraft arrive at the same orbit and approach to a very close distance.

Rent's rule

A rule describing the relationship between the number of external signal connections to a logic block (i.e. the number of "pins") with the number of logic gates in the logic block.

rep

A fabric made of silk or wool, or of silk and wool, and having a transversely corded or ribbed surface.

reporting mark

A code of up to four letters allocated to and used by railroads and other owners of rolling stock for identification purposes, shown on each rail vehicle in combination with an individual number for the vehicle.