Schmitt trigger
A comparator circuit with hysteresis implemented by applying positive feedback to the non-inverting input of a comparator or differential amplifier. It converts an analog signal to a digital one.
Entries starting with S
965 entries.
school bus
An informal approximate unit of measure, from the length of a typical public school bus, approximately 30 feet or 9 metres.
schoolmarm
A tree with two or more trunks; a forked tree.
Schwalbe
The World War II Messerschmitt Me-262 jet fighter.
scissors
A type of defensive maneuver in dogfighting, involving repeatedly turning one's aircraft towards that of the attacker in order to force them to overshoot.
scissors crossover
nounRail equipment
A superimposed pair of railway crossovers, resembling the letter X, permitting travel in either direction between a pair of parallel tracks.
SCNR
Initialism of signal to effective clipping noise ratio.
scob
nounManufacturing
A flaw in which the weft misses a few warp threads.
scoop
nounAutomotive
An opening in a hood/bonnet or other body panel to admit air, usually for cooling the engine.
scoop bonnet
A bonnet with a long narrow front in the shape of a scoop, formerly worn by women.
scoop driver
One who operates an automated mining scoop.
scooper
A type of air tanker waterbomber airplane, which is capable of landing on water, and directly scooping up water to fill its tanks, by skimming the water's surface with scoops delopyed.
scoria
nounMetallurgy
The slag or dross that remains after the smelting of metal from an ore.
scourge
Of a crop or a farmer: to deplete the fertility of (land or soil).
SCR
Initialism of silicon controlled rectifier.
scram
To mine for ore on a small scale, especially from mines previously been worked on where most of the ore is believed to have been removed.
scramjet
A jet engine capable of propelling an aircraft at hypersonic speeds, in which combustion of the fuel and air mixture occurs at supersonic speeds.
screed
nounConstruction
Senses relating to building construction and masonry.
screeding
nounConstruction
The process of producing a smooth flat layer of concrete or similar material.
screen
A material woven from fine wires intended to block animals or large particles from passing while allowing gasses, liquids and finer particles to pass.
screen mask
A component used for precise printing on devices such as circuit boards.
screen print
A print produced by screen printing.
screen wall
nounConstruction
a nonstructural wall erected around units or curbs on a roof. Typically the framing consists of girts with a wood or metal covering attached to the frame.
screen-print
To apply ink or another material onto a surface through a prepared screen, in order to create a picture, design, or pattern.
screen-printed
adjectiveIndustrial printing
That has been designed or produced using a screen printing process.
screener
A person employed to filter the mined coal through a metal screen to remove impurities.
screenless
adjectiveIndustrial printing
That does not involve a screen; see screen printing.
screenman
A person employed to screen the coal to remove impurities.
screw box
A device, resembling a die, made of a type of spindle, for cutting the thread on a wooden screw.
screw theory
The algebraic calculation of pairs of vectors, such as linear and angular velocity, that arise in the kinematics of rigid bodies.
scribe
verbCarpentry
To cut (something) in order to fit it closely to an irregular surface, as a baseboard to a floor which is out of level, a board to the curves of a moulding, etc.
scribing block
nounMetalworking
A device for scribing (marking) lines at a specific height from the base of an object, prior to machining.
scrivet
nounAutomotive
A type of fastener made of plastic, comprising a screw and a captive nut, made for one-sided access in fastening body panels, fairings, splash shields, and so on; an instance thereof.
scroll
nounHydraulics
A spiral waterway placed round a turbine to regulate the flow.
scrubber
A horizontal bar allowing the user to set the playback position.
SCSI
Initialism of Small Computer Systems Interface.
scuffle
To work the soil surface for weeding, etc.
scumming
The accumulation of sticky ink on a plate.
scuttle
nounConstruction
A hatch that provides access to the roof from the interior of a building.
SDHC card
A type of flash memory card with storage capacities ranging from 4 to 32 gigabytes.
SDP
Initialism of service data point.
SDR
Initialism of single data rate.
SDSL
symmetric digital subscriber line
SDV
nounAutomotive
Initialism of software-defined vehicle / software-driven vehicle.
SE
Initialism of sustainer engine.
sea link
A regular connection between two (or more) ports, such as that provided by a ferry service.
sealant
nounConstruction
A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected.
sealant backing
nounConstruction
A compressible material placed in a joint before applying sealant.
seam
nounConstruction
A joint formed by mating two separate sections of materials.
seam allowance
The part of the material or fabric added to the dimensions of a sewing pattern outside the seam.
seam presser
A heavy roller to press down newly ploughed furrows.
Sears-Haack body
The shape with the lowest theoretical wave drag in supersonic flow, for a given body length and a given volume.
SEAT
Acronym of single-engine air tanker.
seat belt
nounAutomotive
A restraining belt attached to a vehicle seat and fastened around occupants in order to keep them in place and decelerate them smoothly rather than suddenly in an accident, mitigating the risk of injury from uncontrolled impact with injurious objects.
seat earth
A bed of clay that underlies a coal seam.
seat lock
nounRail equipment
The lock of a reversible seat in railroad cars.
seat only
A package holiday rate without confirmed accommodation reservations, or using a dummy reservation, enabling the tour operator to sell charter airline seats in competition with the airlines.
seat-mile
A unit of measure of passenger carrying capacity, equal to the number of seats available multiplied by the number of miles flown.
seatearth
The layer of sedimentary rock underlying a coal seam.
seated
adjectiveManufacturing
Of a woman's skirt, stretched out and baggy over the wearer's buttocks from much sitting while wearing the skirt.