ExpertGlossary terms starting with I

2,197 terms

  1. Isentropic Surface A two-dimensional surface containing points of equal potential temperature.
  2. ISG Industry Support Group.
  3. ISIS 2503 A substance that is being studied in the treatment of cancer.
  4. ISIS 3521 A substance that is being studied in the treatment of cancer.
  5. ISIS 5132 A substance that is being studied in the treatment of cancer.
  6. ISIS and TWAIN Scanner Drivers Specialized applications used for communication between scanners and computers.
  7. islet cell A pancreatic cell that produces hormones (e.g., insulin and glucagon) that are secreted into the bloodstream.
  8. islet cell carcinoma (I-let sel KAR-sih-NOH-muh) A rare cancer that forms in the islets of Langerhans cells (a type of cell found in the pancreas).
  9. islet cell tumor (I-let sel TOO-mer) A mass of abnormal cells that forms in the endocrine (hormone-producing) tissues of the pancreas.
  10. islet of Langerhans cell (EYE-let of LANG-er-hanz) A pancreatic cell that produces hormones (e.g., insulin and glucagon) that are secreted into the bloodstream.
  11. Islet's of Langerhans Cellular masses varying from a few to hundreds of cells lying in the interstitial tissue of the pancreas; they are composed of different cell types which…
  12. ISM (1) Industrial Security Manual. (2) Integrated Structure Model.
  13. ISMAP A Web page feature in which hyperlinks are assigned or "mapped" to different portions of a graphic image.
  14. ISMF (Interactive Storage Management Facility) the interactive interface of DFSMS/MVS that allows users and storage administrators access to storage management functions.
  15. ISMG International Simulation & Modeling Group.
  16. ISMO Information Security Management Office.
  17. ISO International Standards Organization.
  18. ISO (International Organization for Standardization) A non-governmental network of the national standards institutes from 151 countries.
  19. ISO 3166 The international standard for country codes maintained by the International Organization for Standardization (ISO).
  20. ISO 8211 The third of three parts of the SDTS (see SDTS) that specifies data transfer implementation (i.e., encoding method).
  21. ISO 9000 Established in 1987, ISO 9000 is an international set of five related standards for qualification of global quality assurance and quality control…
  22. ISO 9660 Volume and file structure of CD-ROM for Information Interchange. A standard for the organization of data on CD-ROM media established by the International…
  23. ISO 9660 CD Format The International Standards Organization format for creating CD-ROMs that can be read worldwide.
  24. iso-electric focusing gel (Abbreviation: IEF gel). A variant of gel electrophoresis, in which macromolecules (usually protein s) are separated on the basis of differing…
  25. iso-osmotic See: isotonic.
  26. isoallele Multiple similar copies of a gene, usually located at independent positions in the genome, which encode similar gene products and produce the same, or a…
  27. Isobar A line connecting points of equal pressure.
  28. Isobaric Chart A weather map representing conditions on a surface of equal atmospheric pressure.
  29. Isobaric Process Any thermodynamic change of state of a system that takes a place at constant pressure.
  30. Isobath An imaginary line on the earth's surface or a line on a map connecting all points which are the same vertical distance above the upper or lower surface of…
  31. ISOC Abbreviation for Internet Society. A nongovernmental, international organization for global cooperation and coordination for The Internet and its…
  32. Isochrome A curve showing the distribution of the excess hydrostatic pressure at a given time during a process of consolidation.
  33. isochromosome A chromosome produced following an error in meiosis, in which the two arms are mirror images of each other.
  34. Isochrone A line on a chart connecting equal times of occurrence of an event. In a weather analysis, a sequence plotted on a map of the frontal positions at several…
  35. isochronous 1. Of a periodic signal, pertaining to transmission in which the time interval separating any two corresponding transitions is equal to the unit interval…
  36. isochronous burst transmission In a data network where the information-bearer channel rate is higher than the input data signaling rate, transmission performed by interrupting, at…
  37. isochronous demodulation Demodulation in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval.
  38. isochronous distortion The difference between the measured modulation rate and the theoretical modulation rate in a digital system.
  39. isochronous modulation Modulation in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval.
  40. isochronous signal A signal in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval.
  41. isodiametric Commonly used to describe cells with equal diameters.
  42. Isodop A contour of constant Doppler velocity values.
  43. Isodrosotherm A line connecting points of equal dew point temperature.
  44. Isoenzyme See: isozyme.
  45. isoflavone An estrogen-like substance made by some plants, including the soy plant. Soy isoflavones are being studied in the prevention of cancer, hot flashes that…
  46. isoform 1. A tissue-specific form of a protein. 2. Synonym of isoenzyme.
  47. isogamy Fusion of gametes of similar size and structure.
  48. isogenic A group of individuals that possesses the same genotype, irrespective of their being homozygous or heterozygous.
  49. isogenic stock Strains of organisms that are genetically nearly identical, except with respect to identified genes.
  50. Isoheight Same as a contour depicting vertical height of some surface above a datum plane.
  51. Isohel A line on a weather map connecting points receiving equal sunlight.
  52. Isohyet A line that connects points of equal rainfall.
  53. isointense Having the same intensity as another object. Used to describe the results of imaging tests, such as x-rays, MRIs, or CT scans.
  54. ISOL Isolate(d)
  55. isolate To restrict communication in both directions with a participant of the conference. [T1.647-1995]
  56. Isolated A National Weather Service convective precipitation descriptor for a 10 percent chance of measurable precipitation (0.01 inch).
  57. isolated bonding network Synonym isolated ground plane.
  58. isolated ground plane A set of interconnected frames that is intentionally grounded via only one connection to a ground reference; this plane, taken as a conductive unit with…
  59. isolated hepatic perfusion (I-soh-LAY-ted heh-PA-tik per-FYOO-zhun) A procedure in which a catheter is placed into the artery that provides blood to the liver.
  60. isolated limb infusion (I-soh-LAY-ted LIM in-FYOO-zhun) A procedure used to deliver anticancer drugs directly to an arm or leg but not to the rest of the body.
  61. isolated limb perfusion (I-soh-LAY-ted LIM per-FYOO-zhun) A procedure that may be used to deliver anticancer drugs directly to an arm or leg.
  62. isolated lung perfusion (I-soh-LAY-ted ... per-FYOO-zhun) A surgical procedure during which the circulation of blood to the lungs is separated from the circulation of blood…
  63. isolated NRZ pulse A single bit period of logical value "1" with adjacent bit periods of logical value "0". [T1.106-1988]
  64. isolated pulse A pulse free from the effects of the other pulses in the same signal. (A suitable testing signal is a repetitive pattern of one "one" and seven "zeros".
  65. isolated RZ pulse Any bit period of logical value "1." [T1.106-1988]
  66. Isolated Solar Gain System A type of passive solar heating system where heat is collected in one area for use in another.
  67. isolated structure A possible holding spot for fish, especially bass. Examples include a single submerged bush or rock pile on a point, a mid-lake hump, or a large tree that…
  68. isolating mechanism The properties of an organism that prevent interbreeding (and therefore exchange of genetic material) between members of different species that inhabit…
  69. Isolation (I-soh-LAY-shun) State of being separated from others. Isolation is sometimes used to prevent disease from spreading.
  70. isolation medium An optimum plant tissue culture medium suitable for explant survival, growth and development.
  71. isolator See optical isolator.
  72. ISOLD Isolated
  73. isoline A line on a surface connecting points of equal value.
  74. isomer One of two or more compounds that have the same chemical formula but different arrangements of the atoms within the molecules and that may have different…
  75. isomerase Any of a class of enzymes that catalyse the re-arrangement of the atoms within a molecule, thereby converting one isomer into another.
  76. Isometric transition A mode of radioactive decay where a nucleus goes from a higher to a lower energy state. The mass number and the atomic number are unchanged.
  77. ISOO Information Security Oversight Office.
  78. Isopleth A broad term for any line on a weather map connecting points with equal values of a particular atmospheric variable (temperature, dew point, etc.).
  79. isosulfan blue (I-soh-SUL-fan …) A dye made in the laboratory that helps identify the sentinel lymph node (the first lymph node that cancer spreads to from a…
  80. Isotach A line connecting points of equal wind speed.
  81. Isotherm A line connecting points of equal temperature.
  82. Isothermal Having a constant temperature.
  83. isotonic Solutions with the same osmotic potential, as a result of being of the same molar concentration.
  84. isotope (I-soh-tope) A form of a chemical element in which the atoms have the same number of protons (part of the nucleus of an atom) but with a different number…
  85. Isotopes atoms that have the same number of protons, but a different number of neutrons are isotopes of each other.
  86. isotretinoin A drug that is used in the treatment of acne and psoriasis and is being studied in cancer prevention. It is a type of retinoid.
  87. Isotropic the property of being independent of direction. Isotropic radiation has the same intensity regardless of the direction of measurement.
  88. isotropic antenna A hypothetical antenna that radiates or receives equally in all directions. Note: Isotropic antennas do not exist physically but represent convenient…
  89. isotropic gain Synonym absolute gain.
  90. Isotropic mass A mass having the same property (or properties) in all directions.
  91. Isotropic Nuclear Weapon A nuclear explosive, which radiates x-rays and other forms of radiation with approximately equal intensity in all directions.
  92. isozyme A genetic variant of an enzyme. Isozymes for a given enzyme share the same function, but may differ in level of activity, as a result of minor differences…
  93. ISP (Internet Service Provider). A business that delivers access to the Internet.
  94. ISP (Internet Service Provider) A business that delivers access to the Internet.
  95. ispinesib (is-PIN-eh-sib) A substance being studied in the treatment of cancer. Ispinesib blocks a protein that tumor cells need to divide.
  96. ISR International Search Report (Form PCT/ISA/210), produced by an International Searching Authority, is a report listing citations of published documents…
  97. ISS (1) Information System Security. (2) Infrared Surveillance System.
  98. ISSA Information System Security Association.
  99. ISSAA Information Systems and Software Acquisition Agency.
  100. ISSC Information Systems Security Committee.