signal post
nounRail equipment
A post on which one or more railway signals are mounted.
Entries starting with S
965 entries.
signal processing
A subfield of electrical engineering focusing on analyzing, modifying and synthesizing signals, such as sound, images, potential fields, seismic signals, altimetry processing, and scientific measurements.
signal timing
nounAutomotive
A technique which traffic engineers use to distribute right of way at a signalized intersection.
signal tracer
A piece of electronic test equipment used to troubleshoot radio and other electronic circuitry.
signalling
nounRail equipment
The signals and associated equipment required for their operation.
signalling event
A change of the state of a communication channel, each state representing a symbol that is to be transmitted.
signature
A group of four (or a multiple of four) sheets printed such that, when folded, they become a section of a book.
silicon lottery
The uncertainty surrounding microprocessors' overclocking potential, which is typically unknown to a consumer (so that, by chance, some get products that prove able to overclock better than others).
sill
nounConstruction
A threshold; horizontal structural member of a building near ground level on a foundation or pilings, or lying on the ground, and bearing the upright portion of a frame; a sill plate.
silo
A vertical building, usually cylindrical, used for the production of silage.
silo truck
nounAutomotive
A commercial truck carrying free-flowing bulk products in its own silo (a type of truck).
silva
The forest trees of a particular area
silver box
A modified DTMF box that adds four additional keys, creating a four-column-by-four-key grid.
silvics
The study of the characteristics of trees, including especially their role in the ecology of their forest habitats; such information collected about individual trees and tree species.
silvopasture
A forested or wooded area where domesticated animals are allowed to graze.
SIM
Acronym of Subscriber Identity Module.
simatic
adjectiveMining and extraction
Composed predominantly of silica-bearing, magnesia-bearing, and ferriferous minerals such as olivine, pyroxene, amphibole, and biotite.
SIMM
initialism of Single in-line memory module
simple
Part of the apparatus for raising the heddles of a drawloom.
simple harmonic motion
oscillating motion (as of a pendulum) in which the acceleration of the oscillator has an equal magnitude but opposite direction to the displacement of it from the equilibrium position.
simplex
adjectiveElectrical engineering
Of a circuit or device: involving signals which travel in one direction at a time; unidirectional.
Singer
nounAutomotive
A motorcar from a former make of British motor car.
single curve
nounMetalworking
A three-dimensional shape into which a thin flat sheet of material, e.g. metal, can be formed by bending alone, without stretching or compression.
single data rate
A communication signaling technique that transfers data on either the rising edge or the falling edge of the clock signal.
single ticket
A ticket entitling the holder to travel in one direction to a destination.
single-phasing
The abnormal operation of a three-phase machine when its supply is changed by the accidental opening of one conductor.
single-ply membrane
nounConstruction
Roofing membranes that are field applied using just one layer of membrane material (either homogeneous or composite rather than multiple layers.
single-ply roof
nounConstruction
A roof system in which the principal roof covering is a single layer of flexible membrane often thermoset or thermoplastic.
singling
nounRail equipment
The reduction of a railway line from double-track to single-track.
sink
An excavation smaller than a shaft.
sinker
nounConstruction
A sinker nail, used for framing in current construction.
SIPP
Acronym of standard interline passenger procedure, a series of four-letter codes used to indicate a type of vehicle.
SIR
nounManufacturing
Initialism of surface insulation resistance.
SIRTF
Initialism of Space Infrared Telescope Facility.
sister
verbConstruction
To strengthen (a supporting beam) by fastening a second beam alongside it.
sister's thread
A finely embroidered linen thread used in Italian smocks or undergarments worn by women, often featuring intricate blackwork or whitework patterns.
sit
Subsidence of the roof of a coal mine.
sit-up-and-beg
adjectiveTransport and logistics
Of a posture adopted by a person steering a vehicle (such as an aeroplane, car, or motorcycle): sitting up straight, not bent forward or leaning back.
six foot
the area between the closest rails of two parallel standard gauge railway lines, regardless of the actual distance.
six-month club
The official Customs and Border Protection list of countries whose citizens do not require six months' validity on their passport on arrival in the United States.
six-pack
nounAutomotive
A collection of six of something bundled together, especially six cans of beer or soda pop.
size
To sift (pieces of ore or metal) in order to separate the finer from the coarser parts.
size-up
The initial evaluation of an incident and how to deal with it.
skateboard
A skateboard vehicle chassis: A chassis format, used for electric vehicles, which holds the drive motors and power energy store (i.e. batteries), forming the vehicular base; an instance of this format.
skein
A metallic strengthening band or thimble on the wooden arm of an axle of a wagon.
skeleton
A very thin form of light-faced type.
skew
A phenomenon in synchronous digital circuit systems (such as computers) in which the same sourced clock signal arrives at different components at different times.
skew bevel gear
A bevel gear in which the teeth are slanted, forming a spiral-like shape.
ski
One of a pair of long flat runners under some flying machines, used for landing.
skid
A banked sideslip where the aircraft's nose is yawed towards the low wing, often due to excessive rudder input.
skid car
nounAutomotive
A car with a frame on casters attached to it (a skid frame), which lowers the effective weight of the car on its tires, allowing easy skids, simulating aquaplaning and driving on ice
skid road
A rough cleared right of way with logs embedded cross-wise on which logs being harvested would slide or be dragged or skidded.
skidding
The logging operation for pulling cut trees out of a forest.
skidplate
nounAutomotive
A metal plate affixed to the underside of a vehicle to prevent damage to key components in the undercarriage.
skiffling
Rough dressing by knocking off knobs or projections; knobbing.
skim pit
An open-air pit into which a mixture of oil and water is pumped and left to separate so that the oil can be extracted.
skin
That part of a sail, when furled, which remains on the outside and covers the whole.
skinny jeans
A style of form-fitting jeans with very narrow, straight legs, which often taper inward at the ankles.
skip
A transportation container in a mine, usually for ore or mullock.
skipman
The man who loads and operates the skip in a mine.