ExpertGlossary terms starting with L

1,745 terms

  1. LSR Local Storm Report. A product issued by local NWS offices to inform users of reports of severe and/or significant weather-related events
  2. LSRS Loral Space and Range Systems, Sunnyvale, CA.
  3. LST Local Standard Time
  4. LSTS Launcher Station Test Site.
  5. LTA Lead Time Analysis.
  6. LTBT Limited Test Ban Treaty.
  7. LTC Abbreviation for line traffic coordinator.
  8. LTD Limited
  9. LTH Lethality and Target Hardening.
  10. LTL Little
  11. LTLCG Little Change
  12. LTNG Lightning- A visible electrical discharge produced by a thunderstorm. The discharge may occur within or between clouds, between the cloud and air, between…
  13. LTO (Linear Tape-Open) A type of backup tape which can hold as much as 400 GB of data, or 600 CDs depending on the data file format.
  14. LTR Abbreviation for long terminal repeat.
  15. LTS Low Temperature Superconductor
  16. LTST latest
  17. LTV Launch Test Vehicle.
  18. LTV (loan-to-value) The relationship between the amount of money borrowed and the apparised value of the property.
  19. LU Launch and Update.
  20. LU 79553 An anticancer drug that kills cancer cells by affecting DNA synthesis.
  21. LU-103793 An anticancer drug that reduces the risk of tumor cell growth and reproduction.
  22. LUA Launch Under Attack.
  23. Lubricant (LOO-brih-kant) An oily or slippery substance.
  24. LUF Acronym for lowest usable high frequency.
  25. Lug nuts Large nuts applied with a high-pressure air wrench to wheel during a pit stop to secure the tires in place.
  26. lumbar puncture (LUM-bar PUNK-cher) A procedure in which a thin needle called a spinal needle is put into the lower part of the spinal column to collect cerebrospinal…
  27. Lumen The cavity or channel within a tube or tubular organ such as a blood vessel or the intestine.
  28. Lumens/Watt (lpw) A measure of the efficacy (efficiency) of lamps. It indicates the amount of light (lumens) emitted by the lamp for each unit of electrical power (Watts)…
  29. Luminaire A complete lighting unit consisting of a lamp(s), housing, and connection to the power circuit.
  30. Luminance The physical measure of the subjective sensation of brightness; measured in lumens.
  31. luminance range 1. In CRT displays, the difference in brightness between the lightest and the darkest element of a scene or its display. [After SMPTE] 2.
  32. luminance signal 1. In television technology, the signal that describes (a) the distribution of brightness levels within the image and (b) the equation for deriving that…
  33. Luminar or LuminAR Illuminated roulette table made by John Huxley, suppliers of casino equipment. The LuminAR roulette table is eye-catching by illuminating the winning…
  34. luminescent diode See superluminescent LED.
  35. Luminosity The total energy released by an object emitting light, (in our case, this will be a star) per unit time (usually per second).
  36. luminous flux The rate of flow of radiant energy. Note: Luminous flux is expressed in lumens (cd sr).
  37. luminous intensity See candela.
  38. Lump sum A lump sum is an amount of money you pay or receive all at once rather than in increments over a period of time.
  39. Lump sum alimony see "alimony in gross."
  40. Lump-Sum Distribution When you retire, you may have the option of taking the value of your pension, salary reduction, or profit-sharing plan in different ways.
  41. Lumpectomy (lum-PEK-toh-mee) Surgery to remove the tumor and a small amount of normal tissue around it.
  42. LUN Logical Unit Number. A logical unit of storage.
  43. LUN (Logical Unit Number) A unique identifier used on a SCSI bus to distinguish between devices that share the same bus.
  44. LUN Masking A method to restrict server access to storage not specifically allocated to that server.
  45. Lunette A crescent-shaped or semicircular area or opening on a wall surface.
  46. lung One of a pair of organs in the chest that supplies the body with oxygen, and removes carbon dioxide from the body.
  47. lung biopsy (… BY-op-see) The removal of a small piece of lung tissue to be checked by a pathologist for cancer or other diseases.
  48. lung cancer (lung KAN-ser) Cancer that forms in tissues of the lung, usually in the cells lining air passages.
  49. lung metastasis (...meh-TAS-tuh-sis) Cancer that has spread from the original (primary) tumor to the lung.
  50. lunker A slang term for a very large fish: can also be called a hawg.
  51. LUP Limited U.S. Protection.
  52. Lupron (LOO-pron) A drug used to treat symptoms of advanced prostate cancer. It is also being studied in the treatment of other conditions and types of cancer.
  53. lupus (LOO-pus) A chronic, inflammatory, connective tissue disease that can affect the joints and many organs, including the skin, heart, lungs, kidneys, and…
  54. Lure Any artificial bait used to attract and catch fish.
  55. lurker In the Internet, a participant in a chat room or a subscriber to a mailing list or newsgroup who passively observes but does not actively participate in…
  56. lurking Passive participation in (i.e., monitoring) the activities of a mailing list, a newsgroup, an IRC channel, a video connection, or any other Internet…
  57. lurtotecan An anticancer drug that belongs to the family of drugs called topoisomerase inhibitors.
  58. LUT Limited User Test.
  59. LUT/OA Limited User Test/Operational Assessment.
  60. luteinizing hormone A pituitary hormone which causes growth of the yellow body of the ovary and also stimulates activity of the interstitial cells of the testis.
  61. luteinizing hormone-releasing hormone A hormone that stimulates the production of sex hormones in men and women. Also called LH-RH.
  62. luteinizing hormone-releasing hormone agonist (LOO-tin-eye-zing. . .AG-o-nist) A drug that inhibits the secretion of sex hormones.
  63. lutetium texaphyrin A substance that is being studied in the treatment of cancer using photodynamic therapy. It belongs to the family of drugs called metallotexaphyrins.
  64. Luvox A drug used to treat obsessive-compulsive disorder. It is a type of antidepressant agent and selective serotonin reuptake inhibitor (SSRI).
  65. Lux The unit of illuminance equivalent to 1lumen per square meter.
  66. luxury consumption Nutrient absorption by an organism in excess of that required for optimum growth and productivity.
  67. luxury tax A tax paid on expensive goods and services considered by the government to be nonessential.
  68. lvaluable Able to serve as an "lvalue".
  69. lvalue Term used by language lawyers for a storage location you can assign a new "value" to, such as a "variable" or an element of an "array".
  70. lvalue modifier An adjectival pseudofunction that warps the meaning of an "lvalue" in some declarative fashion.
  71. LVD (Low Voltage Differential) Introduced with Ultra2 SCSI, and further enhanced with Ultra160 and Ultra320 SCSI, LVD technology enables data transfer to 320MB/s and supports cable…
  72. LVL Level
  73. LVLS levels
  74. LVS Loral Vought Systems, a defense industry contractor.
  75. LVT Low Volume Terminal (USN/NATO/Telecomm term).
  76. LW Laser Weapons.
  77. LWAN Local Wide Area Net.
  78. LWIR See Long Wavelength Infrared.
  79. LWIR FPA (PET) Long Wavelength Infrared Focal Plane Array (Pilot-line Experiment Technology).
  80. LWR Lower
  81. LY231514 A drug that is used to treat malignant pleural mesothelioma and advanced non-small cell lung cancer and is being studied in the treatment of other types…
  82. LY293111 A substance that is being studied as a treatment for cancer. It belongs to the family of drugs called leukotriene B4 receptor antagonists.
  83. LY317615 A substance being studied in the treatment of certain types of cancer, including non-Hodgkin lymphoma, breast, colon, lung, ovarian, and prostate.
  84. LY335979 A substance being studied in the treatment of cancer. LY335979 may help kill cancer cells that are resistant to anticancer drugs.
  85. LY353381 hydrochloride (... HY-droh-KLOR-ide) A substance being studied in the treatment of osteoporosis and breast cancer.
  86. lyase Any of a class of enzymes that catalyse either the cleavage of a double bond and the addition of new groups to a substrate, or the formation of a double…
  87. lycopene (LIE-kuh-peen) A red pigment found in tomatoes and some fruits. It is an antioxidant and may help prevent some types of cancer.
  88. Lymph (limf) a transparent, slightly yellow liquid found in the lymphatic vessels.
  89. lymph (limf) The clear fluid that travels through the lymphatic system and carries cells that help fight infections and other diseases. Also called lymphatic fluid.
  90. lymph gland A rounded mass of lymphatic tissue that is surrounded by a capsule of connective tissue.
  91. Lymph Node A small rounded or bean-shaped mass of lymphatic tissue that helps the body's immune system.
  92. lymph node (limf node) A rounded mass of lymphatic tissue that is surrounded by a capsule of connective tissue.
  93. lymph node dissection (limf node dis-EK-shun) A surgical procedure in which the lymph nodes are removed and examined to see whether they contain cancer.
  94. lymph node drainage The flow of lymph from an area of tissue into a particular lymph node.
  95. lymph node mapping The use of dyes and radioactive substances to identify lymph nodes that may contain tumor cells. Also called lymphatic mapping.
  96. Lymph nodes (LIMF nohdz): Small glands that help the body fight infection and disease. They filter a fluid called lymph and contain white blood cells.
  97. lymph vessel (limf ...) A thin tube that carries lymph (lymphatic fluid) and white blood cells through the lymphatic system. Also called lymphatic vessel.
  98. Lymph vessels (limf veh'-sels) tubes in the body that carry the lymph fluid.
  99. lymphadenectomy (LIM-fa-deh-NEK-toh-mee) A surgical procedure in which the lymph nodes are removed and examined to see whether they contain cancer.
  100. lymphadenopathy (lim-FA-deh-NAH-puh-thee) Disease or swelling of the lymph nodes.