hoarding
nounConstruction
A temporary fence-like structure built around building work to add security and prevent accidents to the public.
Entries starting with H
199 entries.
hod boy
A boy employed to convey coal to wagons in the working place.
hog
verbMachining
To take a rough cut, quickly removing material; to hog out.
hogger pump
The uppermost pump in the pit of a mine.
hogging
nounMachining
Making a rough cut to quickly remove material
hoistman
A person who operates the hoisting machinery.
hoistroom
A space at the top of a mineshaft that holds the elevator to lift humans and equipment using a pulley and cable.
Holbein stitch
A simple, reversible line embroidery stitch commonly used in blackwork and Assisi embroidery.
hold time
The amount of time spent in a phone queue on hold.
holder-up
nounMetalworking
A bucker; one who bucks rivets, typically holding a heavy bucking bar against the bucktail of a rivet (heated if necessary till it is soft), while the riveter (or gunner or, before mechanisation, basher) uses a rivet gun (an adjustable-impulse pneumatic hammer) fitted with a rivet set, against the factory head to provide impulses which upset the bucktail into a field head.
hole
A passing loop; a siding provided for trains traveling in opposite directions on a single-track line to pass each other.
home run
A connection from a central distribution point or circuit breaker to a destination.
home signal
nounRail equipment
A railway signal controlling entry to the next section of line. Originally it meant a signal governing entry into a station.
honey plant
Any plant from which bees usually collect nectar, pollen, or both for making honey.
honeycomb coil
A type of coil structure used in electrical wire winding, in order to reduce capacitive effects.
honeycomb quilt
A quilt made of many hexagonal pieces of fabric to create a design based on the structure of a bee's honeycomb.
honeycomb radiator
nounAutomotive
A radiator core consisting of a stack of small tubes with flared ends resembling a honeycomb.
honeycomb sandwich
nounConstruction
A composite structure made up of a honeycomb core sandwiched between two facesheets.
honeycomb stitch
A decorative stitch used in knitting and embroidery that creates a hexagonal pattern.
Hong Kong finish
A technique for finishing a seam where the raw edges of the fabric are bound with another fabric, usually with bias tape or silk; a bound seam.
honorary steam locomotive
A diesel locomotive that outputs a large amount of exhaust, to the point it resembles the exhaust from a steam locomotive, particularly those produced by the American Locomotive Company.
hook flash
A signal that briefly disconnects the local loop circuit by means of the hookswitch or a dedicated button, used to control functions on the public telephone exchange.
hook pin
nounConstruction
A pin with a hooked head, used to pin together the frame of a floor or roof.
hop garden
A field, fields or farm where hops are grown.
hopback
nounManufacturing
A sealed chamber between the brewing kettle and counter-flow wort chiller, into which hops are added.
hopper car
A railroad freight car which is used to transport bulk materials in a hopper, the load being usually discharged through one or more hinged doors at the bottom of the car.
hopper wagon
A railway goods wagon which is used to transport bulk materials in a hopper, the load being usually discharged through the bottom of the wagon.
horizontal machining center
nounManufacturing
A machining center (of milling type) whose primary spindle is of the horizontal type.
horn
nounCarpentry
An object whose shape resembles a horn, such as cornucopia or the point of an anvil.
horse
A mass of earthy matter, or rock of the same character as the wall rock, occurring in the course of a vein, as of coal or ore; hence, to take horse (said of a vein) is to divide into branches for a distance.
horsepower-hour
A unit of energy equal to the amount of work a horse is capable of delivering during an hour.
hose bridge
A device laid over a hose so that vehicles can pass over it without pinching or damaging it.
hose jacket
A device that clamps around a burst or leaking portion of hose.
HOT
nounAutomotive
Acronym of high-output turbo (turbocharger).
hot bed
A garden bed using such a heat-generating mass; a hotbox.
hot chassis
A metal chassis, used as a base for electrical equipment, that is live because it lacks a transformer to isolate the equipment from the mains.
hot hatch
A high-performance hatchback small motor car.
hot metal
Printing type cast from molten metal; hot metal typesetting.
hot microphone
A microphone that is activated (but not powered) by the sound of the user's voice, allowing it to pick up speech without having to be manually turned on, while still rejecting background noise unaccompanied by speech.
hot patch
nounConstruction
A repair for cracks and potholes in a paved surface involving filling them with hot, molten asphalt concrete.
hot roll
verbMetalworking
To roll metal in a temperature that is above its recrystallization point.
hot rolling
nounMetallurgy
A rolling of metal at a temperature above that of its recrystallization point.
hot shift
nounAutomotive
An early mechanism that synchronized the speeds of gear wheels when changing gear in an automobile.
hot short
adjectiveMetallurgy
Of metal: brittle at high temperatures.
hot spot
A location which has a higher temperature or amount of radiation than surrounding areas.
hot stamp
nounMetallurgy
An impression made in a hot metal forging.
hot tear
nounMetallurgy
A fracture in a metal casting that occurs during solidification as a result of hindered contraction.
hot top
nounMetalworking
In casting, a live open riser with a hot ceramic liner, designed to counteract the formation of harmful hollows when casting objects of materials such as metals into molds.
hot work
nounMetallurgy
Any of several plastic deformations of metal (or other material) at relatively high temperatures.
hot zone
An area to which access is restricted because it is contaminated with radiation or a chemical or biological biohazard.
hotel load
The electrical load caused by all systems on a vehicle (especially a marine vessel or a truck) other than propulsion.
hourly rating
nounRail equipment
A measure of the maximum output, usually expressed in horsepower, that can be obtained from the motors of an electric locomotive for a period of one hour without the motors overheating.
HPP
nounAutomotive
Initialism of high performance powertrain
HRT
nounManufacturing
Initialism of half-rectangle triangle.
HS-PDSCH
Initialism of High Speed Physical Downlink Shared Channel (in UMTS).
HS-SCCH
Initialism of High Speed Shared Control Channel (in UMTS).
HSCSD
Initialism of Highspeed Circuit Switched Data (2.5G).
HSDI
nounAutomotive
Initialism of high-speed (diesel) direct injection.
HSP
nounManufacturing
Initialism of highest shoulder point.
HST
nounManufacturing
Abbreviation of half-square triangle.