Flash FloodA sudden flood event through a valley, canyon, or wash, following a short duration, high-intensity rainfall.
Flash Flood Guidance(FFG) Forecast guidance produced by the River Forecast Centers, often model output, specific to the potential for flash flooding (e.g.
Flash Flood Guidance (FFG)An internal product produced by the RFCs containing rainfall threshold values which must be exceeded in order to produce a flash flood.
Flash Flood Statement(FFS) In hydrologic terms, a statement by the NWS which provides follow-up information on flash flood watches and warnings.
Flash Flood Statement (FFS)A statement by the NWS which provides follow-up information on flash flood watches and warnings.
Flash Flood TableA table of pre-computed forecast crest stage values for small streams for a variety of antecedent moisture conditions and rain amounts.
FLASH messageA category of precedence reserved for initial enemy contact messages or operational combat messages of extreme urgency. Brevity is mandatory. [JP 1-02]
Flash PointThe minimum temperature at which a liquid gives off vapor within a test vessel in sufficient concentration to form an ignitable mixture with air near the…
flash signalA loop-open signal of 300 to 1000 ms at the network interface (NI) that is generated by the network, typically under the control of the far-end customer…
Flash-Steam Geothermal PlantsWhen the temperature of the hydrothermal liquids is over 350 F (177 C), flash-steam technology is generally employed.
FlashboardsTemporary barriers, consisting of either timber, concrete or steel, anchored to the crest of a spillway as a means of increasing the reservoir storage.
FlashingStrips of sheet metal bent to fit the angle between any two roof surfaces or between the roof and any projection, such as a chimney.
FlashpointThe minimum temperature at which sufficient vapor is released by a liquid or solid (fuel) to form a flammable vapor-air mixture at atmospheric pressure.
flatIn fishing, a shallow section of water where game fish feed or spawn.
Flat BettorA player who never varies the size of his bets, and bets the same amount each time.
flat fadingFading in which all frequency components of a received radio signal vary in the same proportion simultaneously.
Flat Plate Solar Photovoltaic ModuleAn arrangement of photovoltaic cells or material mounted on a rigid flat surface with the cells exposed freely to incoming sunlight.
Flat Plate Solar Thermal/Heating CollectorsLarge, flat boxes with glass covers and dark-colored metal plates inside that absorb and transfer solar energy to a heat transfer fluid.
flat rate serviceTelephone service in which a single payment permits an unlimited number of local calls to be made without further charge for a specified period of time.
Flat RoofA slightly sloped roof, usually with a tar and gravel cover. Most commercial buildings use this kind of roof.
Flat slab or slab and buttress damA buttress dam with buttresses which support the flat slab of reinforced concrete which forms the upstream face.
Flat taxA flat tax, also known as a regressive tax, applies to everyone at the same rate, as a sales tax does.
Flat UniverseA universe where the geometry of space does not curve but is flat like a tabletop. In a flat universe the total energy density equals the critical density.
flat weightingIn a noise-measuring set, a noise weighting based on an amplitude-frequency characteristic that is flat over a frequency range that must be stated.
Flat-Black PaintNonglossy paint with a relatively high absorptance.
Flat-outSlang term for racing a car as fast as possible under the given weather and track conditions.
Flat-plate PVA type of photovoltaic solar energy technology that uses a flat plate onto which are installed solar cells.
Flat-plate reflector (heliostat)One of many components of a CSP power tower facility consisting of a large nearly-flat mirror, mounted on a support structure that tracks the sun's…
Flatbed ScannerA flat-surface scanner that allows users to input books and other documents.
FlatironsTriangular-shaped landforms along mountain ranges formed by erosion of steeply inclined rock layers or hogbacks.
Flatness ProblemUnder normal gravity, any slight deviation from flatness should quickly get larger : for example a closed universe should recollapse or an open universe…
FlatsLevel or nearly level areas of land marked by little or no relief.
Flats wetlandA level landform composed of unconsolidated sediments, usually mud or sand. Flats are unvegetated or support sparse plant communities, often composed of…
flavin adenine dinucleotide(Abbreviation: FAD). A co-enzyme important in various biochemical reactions. It comprises a phosphorylated vitamin B2 (riboflavin) molecule linked to AMP…
flavonoidA member of a group of substances found in many plants and plant-based foods. Flavonoids have shown antioxidant effects.
flavopiridolA substance being studied as an anticancer drug. It is a type of flavonoid.
flavorPre-OGSI Globus description term that uniquely encompasses Machine Architecture, OS, Compiler and other attributes into a single term, for example…
flaw1. In computer security, an error of commission, an omission, or an oversight that allows protection mechanisms to be bypassed or disabled. 2.
flaw hypothesis methodology1. System analysis and penetration technique in which the specification and documentation for an information system (IS) are analyzed to produce a list of…
flaxseedThe seed of the flax plant. It is a rich source of omega-3 fatty acid, fiber, and a compound called lignin.
flecainideA drug used to treat abnormal heart rhythms. It may also relieve neuropathic pain, the burning, stabbing, or stinging pain that may arise from damage to…
Fleet angleThe angle between the position of a rope or cable at the extreme end wrap on a drum and a line drawn perpendicular to the axis of the drum.
Fleming's ruleA rule stating that if the thumb of the right hand points in the direction of an electric current, then the curled fingers point in the direction of the…
Flemish bondA pattern of brickwork in which each course consists of headers and stretchers laid alternately; each header is centered between the stretcher above and…
Flexible Benefits PlanA benefit program that offers employees a choice between various benefits including cash, life insurance, health insurance, vacations, retirement plans…
flexible capacityThis flexible capacity is a key difference between cloud computing and traditional outsourcing and hosted data centers.
Flexible payment mortgage (FPM)A home-purchase loan plan that allows the borrower to pay interest-only for the first several years of the term.
Flexible pipePipe designed to transmit the backfill load to the soil at the sides of the pipe.
Flexible ResponseThe capability of military forces for effective reaction to any enemy threat or attack with actions appropriate and adaptable to the circumstances…
Flexible sigmoidoscopyAlso called proctosigmoidoscopy. A procedure in which the doctor looks inside the rectum and the lower portion of the colon (sigmoid colon) through a…
Flexible spending accountSome employers offer flexible spending accounts (FSA), sometimes called cafeteria plans, as part of their employee benefits package.
Flexible Spending Account (FSA)An arrangement you set up through your employer to pay for many of your out-of-pocket medical expenses with tax-free dollars.
Flexible-fuel vehicleA vehicle with a single fuel tank designed to run on varying blends of unleaded gasoline with either ethanol or methanol.
flickerIn video, any of several visual artifacts similar to (i.e., manifested as) a stroboscopic effect (jerkiness), sometimes caused by or related to vertical…
Flight PathThe line connecting the successive positions occupied, or to be occupied, by an aircraft, missile, or space vehicle as it moves through air or space.
Flight Readiness FiringA missile system test of short duration conducted with the propulsion system operating while the missile is secured to the launcher.
Flight TestTest of an aircraft, rocket, missile, or other vehicle by actual flight or launching.
Flight Test Vehicle (FTV)Prototype of airborne or spaceborne hardware used to validate a technology concept.
FlingRefers to a near field long period pulse from a strong ground motion resulting in a unidirectional ground heave after rupture.
Flip bucketAn energy dissipator located at the downstream end of a spillway and shaped so that water flowing at a high velocity is deflected upwards in a trajectory…
flip-flopA device that may assume either one of two reversible, stable states. Note 1: The flip-flop is used as a basic control element in computer and…
flippingA method of fishing by which the lure is swung, not cast, to the target or structure, often with as little disturbance of the water as possible.
flipping stickHeavy action fishing rod (usually a baitcasting rod and reel), 7 to 8 feet long, designed for bass fishing using the flipping and or pitching techniques.
float tubeA special fishing tube in which an inner tube is covered by a casing fitted with a seat to allow an angler to float free.
Float-Zone ProcessIn reference to solar photovoltaic cell manufacture, a method of growing a large-size, high-quality crystal whereby coils heat a polycrystalline ingot…
Floatable daysThe number of days during the recreation season on which it is safe to allow floating activities on recreation facilities.
Floatable flowsRiver flows which make rafting and other floating recreation possible.
FloaterAdditional coverage for personal property such as jewelry, artwork, or antiques not otherwise included in the homeowners policy, or included for a nominal…
FloatingThe process of an applicant deciding against locking-in an interest rate at the time of application and instead electing to float with the market until a…
Floating AdsAn ad that appears within the main browser window on top of the page's normal content, appearing to "float" over the top of the page.
Floating an issueWhen a corporation or public agency offers new stocks or bonds to the public, making the offering is called floating an issue.
floating headA magnetic head floating on a layer of air away from the recording surface. Synonyms air-floating head, flying head. [ANSDIT]
floating or float fishingTo traverse a river, stream or lake by some type of watercraft while fishing, most commonly in a tube, raft, canoe, or kayak.
floating pointA method of storing numbers in "scientific notation", such that the precision of the number is independent of its magnitude (the decimal point "floats").
Floating price transactionsBuying or selling a commodity at a price that is not fixed and will be set by mutual agreement, usually based a published price index.
Floating rateA debt security or corporate preferred stock whose interest rate is adjusted periodically to reflect changing money market rates is known as a floating…
Floating sharesFloating shares are shares of a public corporation that are available for trading in a stock market.
Floating StorageUse of LNG tanker ships for LNG storage, rather than simply for transportation, to take advantage of temporal and geographic LNG price differences.
floating-point coding compactionData compaction accomplished by using coefficients, a base, and exponents to specify the scale, range, or magnitude of numbers.
FlocLoose, open-structured mass formed in a suspension by the aggregation of minute particles.