ExpertGlossary terms starting with E

2,146 terms

  1. Earth Limb The apparent outer edge of the earth as viewed from space.
  2. Earth lining Compacted layer of earth on surface of canal or other excavation.
  3. Earth Observation Satellite (EOS) An effort to study the earth as a system while tracking long-term changes on a global scale.
  4. Earth pressure The pressure or force exerted by soil on any boundary. See active earth pressure, at-rest earth pressure, and passive earth pressure.
  5. Earth radiation Earth radiation (terrestrial radiation) The total infrared radiation emitted from the Earth's surface; to be carefully distinguished from effective…
  6. Earth Sheltered Houses Houses that have earth berms around exterior walls.
  7. Earth station A station located either on the Earth's surface or within the major portion of the Earth's atmosphere and intended for communication: with one or more…
  8. Earth terminal In a satellite link, one of the non-orbiting communications stations that receives, processes, and transmits signals between itself and a satellite.
  9. Earth terminal complex In satellite communications systems, the assembly of equipment and facilities necessary to integrate an Earth terminal into a communications network.
  10. Earth-Coupled Ground Source (Geothermal) Heat Pump A type of heat pump that uses sealed horizontal or vertical pipes, buried in the ground, as heat exchangers through which a fluid is circulated to…
  11. Earth-Ship A registered trademark name for houses built with tires, aluminum cans, and earth.
  12. Earthen (or Earthfill) Dam An embankment dam in which more than 50% of the total volume is formed of compacted fine-grained material.
  13. Earthern cattle tank A watering area or basin for cattle that is usually created in a natural drainage area by obstructing natural water flows with berms of soil.
  14. Earthquake Ground shaking caused by the sudden release of energy stored in rock beneath the Earth's surface.
  15. Earthquake Insurance A type of catastrophic coverage available for an additional premium to repair or replace your property/personal belongings when damaged by an earthquake.
  16. Earthwork Any one or combination of the operations involved in altering or movement of earth.
  17. earthworm A common term for any of the many different fishing worms, including night crawlers (two words), garden worms, leaf worms, dillys, and red wigglers.
  18. EAS Abbreviation for extended area service.
  19. ease of use An aspect of the assessment of the effectiveness of a Target of Evaluation, namely that it cannot be configured or used in a manner which is insecure but…
  20. Easement A right to the use of, or access to, land owned by another.
  21. Easements The legal rights that give someone other than the owner access to use property for a specific purpose.
  22. EAST Examiner Automated Search Tools - a system used by patent examiners within the USPTO
  23. Easter Egg Hidden functionality within an application program, which becomes activated when an undocumented, and often convoluted, set of commands and keystrokes are…
  24. Easterlies Any winds with components from the east.
  25. Eastern North Pacific Basin The portion of the North Pacific Ocean east of 140W. The National Hurricane Center in Miami, Florida is responsible for tracking tropical cyclones in this…
  26. Eastern red cedar (...SEE-der) A type of evergreen tree with hard fragrant wood that is a member of the cypress family.
  27. Eastern Test Range (ETR) Beginning at Patrick AFB, FL, this range stretches halfway around the globe where it meets the Western Test Range.
  28. Eave The overhanging edge of a roof.
  29. Eavesdropping Surreptitiously obtaining data from an unknowing end user who is performing a legitimate function.
  30. EB (1) Electron Beam. (2) Enhanced Blast.
  31. EBB Electronic Bulletin Board.
  32. Ebb Current The movement of a tidal current away form the coast or down an estuary.
  33. EBC Electronic Business Center - includes links to Patents EBC and Trademarks EBC a web page containing hyperlinks to all online systems for conducting…
  34. EBCDIC Extended Binary Code Decimal Interchange Code.
  35. EBITDA Earnings before interest, taxes, depreciation, and amortization are commonly shortened to EBITDA.
  36. EbN0 See signal-to-noise ratio per bit.
  37. EBND Eastbound
  38. EBS Emergency Broadcast System
  39. EBV A common virus that remains dormant in most people. It causes infectious mononucleosis and has been associated with certain cancers, including Burkitt…
  40. EBW Electron Beam Welding.
  41. ebXML Electronic Business XML. A group of specifications designed to enable enterprises to conduct business through the exchange of XML-based messages.
  42. EC See: Enzyme Commission number.
  43. EC/EDI Electronic Commerce/Electronic Data Interchange
  44. EC2 (Elastic Compute Cloud) EC2 stands for Amazon's Elastic Compute Cloud. Using EC2 you can launch instances (specific packages of dedicated compute resources) that look and feel…
  45. EC2 compute unit An AWS standard for compute CPU and memory. This measure enables you to evaluate the CPU capacity of different EC2 instance types.
  46. EC2 instance In Amazon EC2, this is simply an instance. Other AWS services use the term EC2 instance to distinguish these instances from other types of instances they…
  47. ECAC Electromagnetic Compatibility Analysis Center.
  48. ECAP (Enhanced Cartridge Access Port) an 80-cartridge enter/eject facility for a StorageTek robotic tape library. See CAP.
  49. ECB Engineering Change Board.
  50. ECC Eastern Colorado Area Office (Loveland, CO).
  51. Eccentric A device for converting continuous circular motion into reciprocating rectilinear motion.
  52. Eccentricity A dimensionless quantity describing the elliptical shape of a planet's orbit.
  53. ecchymosis A small bruise caused by blood leaking from broken blood vessels into the tissues of the skin or mucous membranes.
  54. ECCM Electronic Counter-Countermeasures.
  55. eccrine gland A type of simple sweat gland that is found in almost all regions of the skin. These glands produce sweat that reaches the surface of the skin by way of…
  56. ECCST (Enhanced Capacity Cartridge System Tape) a double length tape cartridge with a nominal uncompressed capacity of approximately 800 Mbytes.
  57. ECDs Element Control Directives.
  58. ecdysone A steroid hormone in insects stimulating the synthesis of proteins involved in moulting and metamorphosis.
  59. echinacea (EH-kih-NAY-shuh) An herb native to North America that has been used to prevent and treat the common cold and other respiratory infections.
  60. Echo Energy back scattered from a target (precipitation, clouds, etc.) and received by and displayed on a radar screen.
  61. echo area See scattering cross section.
  62. echo attenuation In a communication circuit (4- or 2-wire) in which the two directions of transmission can be separated from each other, the attenuation of echo signals…
  63. echo canceler See echo suppressor.
  64. echo cancellation In a system, the reduction of the power level of an echo or the elimination of an echo.
  65. echo check A check to determine the integrity of transmission of data, whereby the received data are returned to the source for comparison with the originally…
  66. echo command A programming language command that causes an echo response from a computer to be displayed on a monitor or printer for analysis or monitoring of the…
  67. echo effect See ghost.
  68. echo line In computer systems, on a hard-output or display device, a line of information that verifies (reflects) data entered into the computer.
  69. echo loss The ratio in dB of the power of a transmitted signal that is echo loss weighted (as specified in ITU-T Recommendation G.
  70. echo path capacity The maximum echo path delay for which an echo canceler is designed to operate. [T1.508-1998]
  71. echo path delay (EPD) The time in milliseconds (ms) between the incidence of a signal and the incidence of that signal's echo at a measurement point. [T1.255-1997]
  72. echo return loss See return loss.
  73. echo sounding The measurement of the depth of a body of water or the distance to an object in a body of water by measuring the time it takes sound or electromagnetic…
  74. echo suppression The procedure by which characters entered into a system are not physically revealed [CESG].
  75. echo suppressor A device for connection to a two-way telephone circuit to attenuate echo signals in one direction caused by signals in the other direction.
  76. Echo Tops The height above ground of the center of the radar beam using the tilt, or scan, that contains the highest elevation where reflectivities greater than 18…
  77. echocardiography (EH-koh-KAR-dee-AH-gruh-fee) A procedure that uses ultrasonic waves directed over the chest wall to obtain a graphic record of the heart's position…
  78. echoplex An echo check used in public switched networks operating in the full-duplex transmission mode, i.e., the two-way-simultaneous mode.
  79. ECL (Execution Control List) An ECL is a feature accessed through the User Preferences dialog box that enhances security of your workstation data.
  80. eclectic Derived from many sources. Some would say too many.
  81. eclosion 1. Emergence of an adult insect from the pupal stage. 2. Initial phase of germination of fungal spores.
  82. ECLS ERINT Command and Launch System.
  83. ECM Enterprise content management.
  84. ECMF European Center for Meteorology Forecast model.
  85. ECMWF European Center for Medium-Range Weather Forecasts. Operational references in forecast discussions typically refer to the ECMWF's medium-range numerical…
  86. ECN Engineering Change Notice.
  87. ECO Engagement Control Orders.
  88. ecological diversity See: biodiversity.
  89. Ecological Footprint The impact of humans on ecosystems created by their use of land, water, and other natural resources.
  90. Ecological Network A set of discrete MPAs within a region that are connected through dispersal of reproductive stages (eggs, larvae, spores, etc.
  91. Ecological Resilience The capacity of an ecosystem or natural population to resist or recover from major changes in structure and function following natural and human-caused…
  92. Ecological resources Biota (fish, wildlife, and plants) and their habitats, which may be land, air, or water.
  93. Ecological segmentation Development that fragments animal habitat and does not provide corridors for movement.
  94. Ecology The study of the interactions of organisms with their environment and with each other.
  95. eComm electronic commerce portal
  96. Economic analysis A procedure that includes both tangible and intangible factors to evaluate various alternatives.
  97. Economic cycle An economic cycle is a period during which a country's economy moves from strength to weakness and back to strength.
  98. Economic development area An area defined by local authorities for govemment-assisted economic programs.
  99. Economic impact study Research into the dollars generated by an industry and how these dollars impact the economy through direct spending and the indirect impact of additional…
  100. Economic indicator Economic indicators are statistical measurements of current business conditions.