underspun
adjectiveTextile production
Too lightly or loosely spun.
Entries starting with U
123 entries.
undertile
adjectiveManufacturing
Of or pertaining to an area or surface beneath or below tile.
underviewer
An underlooker; the manager responsible for a colliery in the absence of the viewer.
underwater
To water or irrigate insufficiently.
underwrap
The portion of a garment that is overlapped by another portion, such as the hidden part of a wrap skirt or the edge that holds buttons which is hidden when a garment is buttoned up.
undock
To depart a spaceship from a dock/berth/mount/mooring under its own power
unentered
adjectiveTransport and logistics
For which no documentation has been filed at the port being entered.
unfitted
Of trains, or wagons in the train, not having a through brake pipe, or brakes on the wagons that can be operated from the locomotive (the wagons did have handbrakes however).
ungreen
verbManufacturing
To expose to air after dyeing in indigo so that the greenish color fades away.
unground
To remove a connection to ground potential.
ungrounded
adjectiveIndustrial electronics
Not connected to ground potential
unhold
To remove from a "hold" or "on hold" state.
unibody
nounAutomotive
An automobile construction technique in which the body is integrated into a single unit with the chassis rather than having a separate body-on-frame.
unijunction
(often attributive) A transistor that has a single junction.
uninterruptible power supply
A device or system that almost instantaneously provides emergency power in the case that main power fails.
union bug
A maker’s mark imprinted on a work to show that it is sanctioned by members of a trade union. It is often a tiny elongated rhomboid containing and surrounded by, in minuscule typeface, identifying names and the union’s local chapter number.
union station
nounRail equipment
A railroad station shared by more than one railroad company, usually to spread the costs and ease the logistics of serving a particular town by rail.
UNISIG
nameRail equipment
Acronym of Union of Signalling Industry.
unit
One kilowatt-hour (as recorded on an electricity meter).
universal logic gate
A logic gate that can be used to re-create the function of all other logic gates.
unlead
To take out the leads from (printed matter that has been set up).
unlock
To configure (a mobile phone) so that it is not bound to any particular carrier.
unlocked
adjectiveElectrical engineering
Not bound to any particular carrier.
unlooper
A device used to break a smart card's microcontroller out of an infinite loop state that makes it otherwise unusable.
unnoble
adjectiveMetallurgy
Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily.
unpick
verbManufacturing
To undo knitting in order to reuse the wool.
unport
To flow away from, and, thus, fail to enter, its intake or drain port.
unporting
The action or process of unporting.
unroadworthy
adjectiveAutomotive
Describing a vehicle which is not safe for use on the road.
unslipped
adjectiveIndustrial ceramics
Not prepared with slip (mix of clay and water).
unsmelted
adjectiveMetallurgy
Not smelted; not having been subjected to a smelting process; still in the state of being an unrefined ore.
unsurfaced
adjectiveTransport and logistics
Not having a tar macadam (asphalt) or other paved surface; unpaved.
untemper
verbMetallurgy
To deprive of temper
unterhefe
nounManufacturing
The yeast that forms at the bottom of the vat.
untopping
Removal of overburden from an old mine to allow continued economic operation.
untravellable
adjectiveTransport and logistics
Unsuitable for or hostile to travel; incapable of being journeyed over or upon.
up
adverbRail equipment
Towards the principal terminus, towards milepost zero.
up-over
A method of shaft excavation by drifting to a point below, and then raising instead of sinking.
upcast
The ventilating shaft of a mine out of which the air passes after having circulated through the mine.
upconversion
Conversion of a lower radio frequency to a higher frequency, possibly using a mixer.
uplead
The line or lines connecting the output of a transmitter to its antenna.
uplift
To be accepted for carriage on a flight.
uplink
The communication path from a mobile device to a base station, a consumer to the network backbone, a client device to a server, etc.
uplock
A mechanism that secures an aircraft's landing gear in the retracted position, helping to prevent an uncommanded gear deployment during flight.
upmaker
A person employed to make up galley proofs in page mode.
upmaking
The arrangement of lines into columns or pages.
upmass
The payload mass carried up to orbit from Earth.
upper garment
A piece of clothing that covers at least the chest of a human being and is worn as the top layer, for example a shirt or sweater.
UPS
Initialism of uninterruptible power supply/source.
upset
verbMetalworking
To thicken and shorten a soft or heated piece of metal, by forging or hammering on the end, to shape, for example, rivets or internal combustion engine valves.
upsetter
nounMetalworking
A kind of forging machine that moves horizontally.
upstand
nounPlumbing
A section of a roof covering or flashing which turns up against a vertical surface.
URL
Initialism of unrestricted line officer.
USART
Initialism of universal synchronous and asynchronous receiver-transmitter.
USB
Initialism of unified S-band (a communication system used for the Apollo program).
USB key
A USB drive used to identify and authenticate a user.
USDOT
Initialism of United States Department of Transportation.
USMCA
The United Nations LOCODE for McAdoo, Pennsylvania, USA
USOS
Initialism of United States Orbital Segment (“the part of the International Space Station that was contributed by the United States of America, or using NASA specification-based modules”).
UTC
phraseTransport and logistics
Initialism of unable to contact.