ExpertGlossary terms starting with D

2,757 terms

degraded minute (DM) A 1-minute interval with a BER (bit error ratio) worse than 10:6. The 1-minute intervals are derived by removing severely errored seconds from the total…
degraded mode The operating mode of a NetApp appliance when a disk in the RAID group has failed or the batteries on the NVRAM card are low.
degraded service state The condition that exists when one or more of the required service performance parameters fall outside predetermined limits, resulting in a lower quality…
degraded unit of time A specified period of time during which bits are transferred from a source to a destination, where a bit error ratio worse than a specified threshold…
Degree Day A unit for measuring the extent that the outdoor daily average temperature (the mean of the maximum and minimum daily dry-bulb temperatures) falls below…
Degree Hour The product of 1 hour, and usually the number of degrees Fahrenheit the hourly mean temperature is above a base point (usually 65 degrees Fahrenheit)…
degree of coherence A dimensionless unit, expressed as a ratio, used to indicate the extent of coherence of an electromagnetic wave such as a lightwave.
degree of isochronous distortion In data transmission, the ratio of (a) the absolute value of the maximum measured difference between the actual and the theoretical intervals separating…
degree of start-stop distortion In asynchronous data transmission, the ratio of (a) the absolute value of the maximum measured difference between the actual and theoretical intervals…
Degrees of Freedom A statistical measure of how unique biometric data is. Technically, it is the number of statistically independent features (parameters) contained in…
dehalogenation The removal of halogen atoms (fluorine, chlorine, bromine, iodine) from molecules, for example during biodegradation.
dehiscence The spontaneous and often violent opening of a fruit, seed pod or anther to release and disperse the seeds or pollen.
dehop To modify a frequency-hopping signal so that it has a constant center frequency.
Dehumidifier A device that cools air by removing moisture from it.
dehydration A condition caused by the loss of too much water from the body. Severe diarrhea or vomiting can cause dehydration.
dehydroepiandrosterone A substance being studied in the prevention of cancer. It is a type of steroid. Also called DHEA.
dehydrogenase An enzyme that catalyses the removal of hydrogen atoms in biological reactions.
dehydrogenation A chemical reaction in which hydrogen is removed from a compound.
DEIS Defense Enterprise Integration Services (ex-DTIS).
dejitterizer A device that reduces jitter in a digital signal. Note 1: A dejitterizer usually consists of an elastic buffer in which the signal is temporarily stored…
dekatherm or decatherm (DTH) Ten therms, same as one million British thermal units or one MMBtu.
DEL Delivery.
Del.icio.us Popular social bookmarking website. See also: Del.icio.us Del.icio.us Recently Popular
Delay A device used to obtain detonation of charges at separate times. An electric blasting cap which explodes at a set interval after current is passed through…
delay distortion In a waveform consisting of two or more wave components at different frequencies, distortion caused by the difference in arrival times of the frequency…
delay encoding The encoding of binary data to form a two-level signal such that (a) a "0" causes no change of signal level unless it is followed by another "0" in which…
delay equalizer A corrective network designed to make the phase delay or envelope delay of a circuit or system substantially constant over a desired frequency range.
delay line A transmission line, or equivalent device, used to delay a signal. 2. A single-input-channel device, such as a single-input sequential logic element, in…
delay modulation See delay encoding.
Delay pattern Order of firing charges obtained by arranging delays to fire separate holes or series of holes at different times.
delay time Synonym delay.
delay working In telephone switchboard operations, operation intended to ensure fair distribution of the time of one or more lines among groups of call originators.
Delayed exchange Same or similar to "tax-free exchange." See also "tax-free exchange."
delayed fan-out Functionality on the Exchange Server 2007 Hub Transport server role where the server uses site link information to optimize the routing of messages that…
Delayed Reporting See Reporting delay.
delayed-delivery facility In a communications network, a facility that stores data, destined for delivery to one or more addresses, for delivery at a later time.
delayed-type hypersensitivity response (...HY-per-SEN-sih-TIH-vih-tee reh-SPONTS) An inflammatory response that develops 24 to 72 hours after exposure to an antigen that the immune system…
delegate A person with permission to manage mail for another user, send mail for another user, or do both. [Exchange 5.5]
delegated accrediting authority Synonym designated approving authority.
delegation An assignment of administrative responsibility to a user, computer, group, or organization. [Exchange 2003]
delete marker An object with a key and version ID, but without content. Amazon S3 inserts delete markers automatically into versioned buckets when an object is deleted.
deleted bit A bit not delivered to the intended destination.
deleted block A block not delivered to the intended destination.
Deleted Data Deleted Data is data that existed on the computer as live data and which have been deleted by the computer system or end-user activity.
Deleted File A file with disk space that has been designated as available for reuse. The deleted file remains intact until it has been overwritten with a new file.
Deleted files When a file is deleted from an operating system (e.g. Windows), the contents of the file may still remain intact.
Deleted Files and Data recoverable information from deleted files and data may be stored in unallocated or slack space on a computer hard drive.
Deletion Deletion is the process whereby data is removed from active files and other data storage structures on computers and rendered inaccessible except using…
Deletion map A description of a specific chromosome that uses defined mutations --specific deleted areas in the genome-- as 'biochemical signposts,' or markers for…
deletion stub A truncated document that is left in a replica in place of the original document to indicate to the Replication task that the document should, in fact, be…
deliberate release In a biotechnology context, the intentional release of genetically modified organisms.
delimiter A "character" or "string" that sets bounds to an arbitrarily-sized textual object, not to be confused with a "separator" or "terminator".
Delincuente juvenil Un menor de 13, 14 o 15 años acusado de actos que constituyen asesinato sin premeditación (second degree murder), o un menor de 14 o 15 años acusado de…
Delinquency A debt that was not paid when due.
delirium (deh-LEER-ee-um) A mental state in which a person is confused, disoriented, and not able to think or remember clearly.
Delito mayor Un delito serio, punible con un período de encarcelamiento mayor de un año.
Delito menor Un nivel menor de delito que es castigado con un período de encarcelamiento de un año o menos.
Delito, crimen Un acto ilícito especificado como delito menor (misdemeanor) o delito mayor (felony) en cualquier ley que rige la conducta.
Delito, infracción, acto ilícito Conducta que conlleva una sentencia de encarcelamiento o de una multa de acuerdo con alguna ley, estatuto o reglamento pertinente que rige la conducta.
Deliverable An item produced or used during development of a system that is required to be made available to the evaluators for evaluation purposes.
delivered block A successfully transferred block.
delivered duplicated frame A frame D received by a particular destination user when both of the following conditions are true: D was not generated by the source user; D is exactly…
delivered errored frame A delivered frame when the value of one or more bits in the frame is in error, or when some, but not all, bits in the frame are lost bits or extra bits (i.
delivered out-of-sequence frame A delivered frame, Fi, that arrives at the destination user after any of the frames F(i+1), F(i+2), . . .
delivered overhead bit A bit that (a) is successfully transferred to a destination user, (b) performs its primary function within the telecommunications system, and (c) does not…
delivered overhead block A block that (a) is successfully transferred to a destination user, (b) performs its primary function within the telecommunications system, and (c) does…
Delivery The amount of water delivered to the point of use. The difference between delivery and release is usually the same as consumptive use.
delivery confirmation Information returned to the originator indicating that a given unit of information has been delivered to the intended addressee(s).
Delivery date The delivery date, also known as the settlement date, is the day on which a stock, option, or bond trade must be settled, or finalized.
Delivery Error The inaccuracy associated with a given weapon system resulting in a dispersion of shots about the aiming point. See also Circular Error Probable. 77
Delivery Point(s) An industry-designated location at which delivery may be made in fulfillment of contract terms.
Delivery queue A queue that is used to hold messages that being delivered to a Mailbox server or remote location.
Dellinger effect An effect--lasting from several minutes to several hours--that causes electromagnetic sky wave signals to disappear rapidly as a result of greatly…
Dellinger fadeout Synonym Dellinger effect.
Dellinger fading Synonym Dellinger effect.
Delta The relationship between an option's price and the price of the underlying stock or futures contract is called its delta.
delta endotoxins See: cry proteins.
delta frame In digital television technology, a video frame created from the preceding key frame by modifying only those pixels that have changed.
delta modulation (DM) Analog-to-digital signal conversion in which (a) the analog signal is approximated with a series of segments, (b) each segment of the approximated signal…
Delta Point Part of a fingerprint pattern that looks similar to the Greek letter delta (Δ), as illustrated below.
Delta T Change in temperature. 1) A simple representation of the mean lapse rate within a layer of the atmosphere, obtained by calculating the difference between…
delta-sigma modulation Delta modulation in which the integral of the input signal is encoded rather than the signal itself.
Delta-V A numerical index of the maneuverability of a satellite or rocket. It is the maximum change in velocity, which a spacecraft could achieve in the absence…
Deltamethrin An insecticide.
Dem/Val OBSOLETE. Demonstration and Validation (DD 5000 term).
demagnetizing Synonym degaussing.
Demand Form PCT/IPEA/401, filed with an International Preliminary Examining Authority, demanding that an international application shall be the subject of an…
Demand (Tankless) Water Heater A type of water heater that has no storage tank thus eliminating storage tank stand-by losses.
demand assignment An operation in which several users share access to a communications channel on a real-time basis, i.e.
demand assignment multiple access (DAMA) In a communications system, a technique for allocating use of bandwidth among multiple users, based on demand.
Demand Charge A charge for the maximum rate at which energy is used during peak hours of a billing period.
Demand Deposit A deposit of funds that can be withdrawn without any advance notice.
Demand elasticity The degree to which demand changes relative to a change in price.
demand factor The ratio of (a) the maximum real power consumed by a system to (b) the maximum real power that would be consumed if the entire load connected to the…
Demand generators Strategies and programs developed by DMOs and suppliers to generate destination demand.
demand load In general, the total power required by a facility. Note: The demand load is the sum of the operational load (including any tactical load) and…
Demand loan A loan having no specific date for repayment but may be called by the lender at any time.
Demand Power see Peak Power
Demand responsiveness/demand response A change in demand for a good or service in response to a change in price for the good or service.
Demand scheduling Method of irrigation scheduling whereby water is delivered to users as needed and which may vary in flow rate, frequency and duration.