Entries starting with G

177 entries.

gravel stop

Flashing installed to prevent the gravel surfacing from being washed off a roof by heavy rain.

gravure

A type of intaglio printing process, in which an image is engraved onto a rotating copper cylinder.

grease

nounIndustrial printingdated, slang

Synonym of fat (“work containing much blank, profitable to the compositor”).

great primer

The size of type between English and paragon, standardized as 18-point, used in the printing of large-format English bibles.

green

adjectiveMetallurgy

Of or pertaining to a part formed from compacted metal powder which has not yet undergone sintering to improve its strength.

greenbody

A ceramic precursor, usually mesostructured with dopants, which has been formed but not yet milled or fired.

greige

adjectiveManufacturing

Of clothing, textiles, etc.: neither bleached nor dyed, nor otherwise fully processed; unfinished.

greillade

nounMetallurgyobsolete

iron ore in coarse powder, prepared for reduction by the Catalan process

grex

A kind of group used in horticultural nomenclature, applied to the progeny of an artificial cross from specified parents, in particular for orchids.

griff

An arrangement of parallel bars for lifting the hooked wires which raise the warp threads in a loom for weaving figured goods.

grinding

The action of grinding a workpiece to change its size, shape, and surface finish.

grinding machine

nounMachiningidiomatic

A machine tool in which a rotating grinding wheel is moved against the workpiece (or vice versa) in order to cut the latter to a desired shape.

grizzly

A grating used to sieve stones by size, so as to keep stones out of the sluices (in hydraulic mining) or to control stone size in the feed to the ore crusher.

grog

A type of pre-fired clay that has been ground and screened to a specific particle size.

ground

An electrical conductor connected to the earth, or a large conductor whose electrical potential is taken as zero (such as a steel chassis).

ground clearance

The measured distance between a level surface and the lowest part (other than tires or equivalent) of the bottom of a vehicle surmounting that surface.

ground frame

A lever frame controlling the operation of points and/or signals which is installed at ground level.

grounding

The interconnecting metal chassis or frame of a device, appliance, machine, or metal raceway via a designated conductor to earth at the service panel. It may be bare or covered, and does not carry current in normal operation.

groundwater level

The level, at a particular site, below which the subsoil and rock masses of the earth are fully saturated with water.

groundway

In shipbuilding, a substantial foundation of wood or stone for the blocks on which a vessel is built.

GROVER

Acronym of Greenland rover and Goddard remotely operated vehicle for exploration and research.

gruit

An herbal mixture, used in the flavouring of beer, that preceded the use of hops.

GST

One of various compounds of germanium, antimony, and tellurium used as a phase change material, including GeSbTe.

Gunn effect

The generation of high-frequency (usually microwave) oscillations within a semiconductor whenever an applied DC voltage exceeds its threshold value.

Gunning transceiver logic

A kind of logic signaling used to drive electronic backplane buses, having a voltage swing between 0.4 and 1.2 volts, much lower than that used in TTL and CMOS logic, and symmetrical parallel resistive termination.

gusset

A kind of bracket, or angular part, fastened in the angles of a structure to give strength or stiffness; especially, the part joining the barrel and the fire box of a locomotive boiler.

gutter

One of a number of pieces of wood or metal, grooved in the centre, used to separate the pages of type in a form.

GVWR

Initialism of gross vehicle weight rating, the maximum allowed weight of a vehicle and its contents.