H-field
An auxiliary vector field that describes the driving magnetic influence produced by free currents, independent of the material's response.
Entries starting with H
315 entries.
H-piece
The part of a plunger pump that contains the valve.
HAC
nounAutomotive
Initialism of hill-start assist control.
hacker
One who uses a computer to gain unauthorized access to data stored in, or to carry out malicious attacks on, computer networks or computer systems.
hacking
The separation of a course of stones into two smaller courses, when there are not enough large stones to form a single course.
hade
To slope or incline from the vertical.
hair bracket
nounManufacturing
A moulding which comes in at the back of, or runs aft from, the figurehead.
hair stroke
A fine line drawn out at the top or bottom of a letter.
half adder
A specific logic circuit that performs an addition operation on two bits.
half shaft
nounAutomotive
Either of the pair of drive shafts that extend from a differential to the wheels.
half-bat
nounConstruction
A bat (brick with one whole end) that is exactly half the length of the original brick.
half-marrow
Either of a pair of young boys employed as putters, pushing wagons in the mine, and dividing their earnings.
half-mast
An unfashionably short length of a pair of trousers.
half-silvered mirror
A mirror that consists of an incomplete reflective coating, so that half of the incident light is reflected and the other half is transmitted.
half-standard
adjectiveAgricultural equipment
A tree or shrub whose branches originate from three to four feet above ground level.
halfpenny
A usually semicircular earmark made in the ear of a livestock animal.
halftone
A picture made by using the process of half-toning.
Hall
nounRail equipment
Hall class, a class of steam locomotive used on the GWR.
HALO
Acronym of high altitude, low opening (“a type of skydiving where one leaves the launch platform from a high altitude and opens the parachute at a very low altitude”).
halo headlight
nounAutomotive
A kind of headlight arranged in a circular pattern.
halt
A minor railway station (usually unstaffed) in the United Kingdom.
halyard
A rope used to extend a ladder.
hammer blow
nounRail equipment
A pounding of the rails by the driving wheels of a steam locomotive caused by the inertia of unbalanced parts.
hammer break
An interrupter in which contact is broken by the movement of an automatically vibrating hammer between a contact piece and an electromagnet, or of a rapidly moving piece mechanically driven.
Hamming code
Any of a family of linear error-correcting codes that generalize the Hamming(7,4)-code invented by Richard Hamming in 1950.
hamper
Articles ordinarily indispensable, but in the way at certain times.
hand-off
The transfer of the radar identification of an aircraft from one controller to another when the aircraft enters the receiving controller's airspace and radio communications with the aircraft are transferred.
hand-tab
verbConstruction
To spot-apply asphalt-based adhesive to shingles for securement and wind resistance.
handblocked
adjectiveTextile production
Having been blocked (shaped) by hand.
handblown
adjectiveManufacturing
Blown by hand, without the use of machinery
handbrake
The mechanism, particularly the locking hand-operated lever or foot-operated toggle lever in a motorcar or the hand-operated crank on a railcar, which is used to set and release such a brake.
handbrake turn
nounAutomotive
An automobile driving manoeuvre where the driver starts turning the vehicle and then pulls on the handbrake to make the rear tyres lose adhesion and thus cause the back of the vehicle to slide around (in the direction of the turn).
handle
nounManufacturing
The tactile qualities of a fabric, e.g., softness, firmness, elasticity, fineness, resilience, and other qualities perceived by touch.
handling time
The total number of business days from the moment one receives payment for an item and the moment when the package is processed or scanned at a shipping carrier.
handman
One who assembles printing type by hand.
handpress
An early printing press operated by means of a handle that applied pressure on the form.
handsomely
adverbMarine and shipyard
Without undue haste; carefully, slowly and steadily.
handwheel
Any wheel worked by hand, whether used to allow leverage, as of a valve or a handbrake, or to allow fine adjustment, as of a set screw.
hanging side
the overhanging side of an inclined or hading vein
hanging wall
the upper wall of inclined vein, or that which hangs over the miner's head when working in the vein.
hard
A firm or paved beach or slope convenient for hauling vessels out of the water.
hard disk
One of a series of parallel magnetic recording disks in a drive unit, used for the recording and retrieval of digital information; used especially in personal computers.
hard drive
An electromechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid, rapidly rotating platters coated with magnetic material.
hard error
A type of error which persists even after power-cycling the equipment; associated with permanent physical damage to the equipment's hardware (for instance, from a latch-up).
hard start
An explosion in a rocket engine during startup, usually due to the presence of too much propellant prior to ignition.
hard-reset
To perform a forceful restart or reinitialization of a device, system, or process, typically by cutting power, or using a dedicated button.
hard-wire
To connect components by means of permanent electrical wires.
hardface
verbMetalworking
To apply a harder or tougher material to (a base metal) by welding.
hardground
A hard stratum of rock other than coal.
hardhead
nounMetallurgy
Residual ore that failed to melt during a smelting process.
hardline
A physical wire or cable connection; landline.
hardrock
Rock containing ore from which minerals are extracted.
hardware description language
Any language from a class of computer, modeling, or specification languages for formal description and design of analogue or digital logic electronic circuits.
hardware node
A physical device that is connected to a network and is able to send, receive, or forward information.
hardwired
adjectiveIndustrial electronics
Designed to perform a specific task.
hardwood
The tree or tree species that yields the preceding.
harness
The part of a loom comprising the heddles, with their means of support and motion, by which the threads of the warp are alternately raised and depressed for the passage of the shuttle.
harpoon fork
A kind of hayfork, consisting of a bar with hinged barbs at one end and a loop for a rope at the other end, used for lifting hay from the load by horse power.
harr
nounCarpentry
The stile that bears the hinges of a gate.
harvest
The process of gathering the ripened crop; harvesting.