ExpertGlossary terms starting with Z

118 terms

Z Zulu time; the same as Universal Coordinated Time (UTC), i.e. 18z is the same as 18:00 UTC.
Z Time Abbreviation for Zulu Time. See Coordinated Universal Time.
Z-DNA A region of DNA that is "flipped" into a lefthanded helix, characterized by alternating purines and pyrimidines, and which may be the target of a…
Z-ray A brand name of heavy spoon typically used in trout fishing.
z-value The value of a surface at a particular x,y location (e.g., elevation). Often referred to as spot values or spot elevations.
Z/R Relationship The empirical conversion relationship between radar reflectivity and precipitation rate.
Z39.50 An ANSI protocol standard for WAN (wide area network) information query and exchange to share library referencing requests via distributed electronic…
Zacks Investment Research This Chicago-based company tracks changes in earnings estimates, as well as buy, sell, and hold recommendations for approximately 5,000 stocks.
Zactima (zak-TEE-muh) A substance being studied in the treatment of lung cancer and other types of cancer.
Zara Puppy, Zara Spook, Zara Pooch Brand names of topwater lures.
Zarnestra (zar-NESS-truh) A substance that is being studied in the treatment of acute myeloid leukemia (AML) and other types of cancer.
ZBTSI (zero-byte time slot interchange) A technique applied to a DS1 frame to ensure pulse density requirements are met, where bits 2 through 193 of each frame are scrambled to minimize the…
ZD0473 A substance that is being studied in the treatment of cancer. It belongs to the family of drugs called platinum analogs.
ZD1839 A drug that is used to treat certain types of non-small cell lung cancer and is being studied in the treatment of other types of cancer.
ZD4054 A substance that is being studied in the treatment of prostate cancer. It belongs to the family of drugs called endothelin-receptor antagonists.
ZD6474 A substance that is being studied as a treatment for cancer. It belongs to the family of drugs called vascular endothelial growth factor-2 (VEGF-2)…
Zeal Non-commercial directory which was bought by Looksmart for $20 million, then abruptly shut down with little to no warning.
Zeal - Volunteer Built Web Directory First launched in 1999, Zeal was a volunteer-built web directory which was bought by LookSmart for $20 million in October 2000.
Zeebrugge European continental terminus of the Interconnector and Bacton-Balgzand pipelines linking the United Kingdom market with European gas receipts.
Zeeman effect A splitting of a spectral line into several components due to the presence of a static magnetic field.
Zen count A card counting system made popular by Arnold Snyder. The zen count is a level two counting system.
Zerg From StarCraft, to attack something with a lot of players/units.
zero Verb. To replace all blocks on a disk with zeros.
Zero air voids curve The curve showing the relationship between dry unit weights and corresponding moisture contents, assuming that all of the voids are completely filled with…
Zero Datum A reference "zero" elevation for a stream or river gage. This "zero" can be referenced (usually within ten feet of the bottom of the channel) to mean sea…
zero dBm transmission level point (0 dBm TLP) In a communication system, a point at which the reference level is 1 mW, i.e., 0 dBm.
zero dispersion window Synonym minimum-dispersion window.
zero insertion See zero-bit insertion.
Zero Point The location of the center of a burst of a nuclear weapon at the instant of detonation.
Zero results A futile query; a query that returns 0 (no) results.
zero stuffing See zero-bit insertion.
Zero sum A zero-sum market is one in which one investor's profit mirrors another investor's loss. For every dollar one person makes, someone else loses a dollar.
zero suppression The elimination of nonsignificant zeros from a numeral.
zero transmission level point (0TLP) Synonym zero dBm transmission level point.
zero width A subpattern "assertion" matching the "null string" between characters.
zero-bit insertion : A bit-stuffing technique used with bit-oriented protocols to ensure that six consecutive "1" bits never appear between the two flags that define the…
Zero-Channel RAID A technology that uses the SCSI controller on the motherboard (instead of a SCSI controller on the RAID card) to enable hardware RAID on a motherboard.
Zero-coupon bond A corporate or municipal debt security sold at a deep discount to its face value that does not pay periodic interest.
Zero-coupon convertible bond A zero-coupon convertible bond, like other convertible bonds, can be converted into stock in the issuing corporation if the stock reaches the trigger…
zero-dispersion slope In a single-mode optical fiber, the rate of change of dispersion, with respect to wavelength, at the fiber's zero-dispersion wavelength.
zero-dispersion wavelength In a single-mode optical fiber, the wavelength or wavelengths at which material dispersion and waveguide dispersion cancel one another.
zero-level decoder A decoder that yields an analog level of 0 dBm at its output when the input is the digital milliwatt signal. [47CFR] Note: The signal is a 1-kHz sine wave.
Zero-lot-line Development A development option where side yard restrictions are reduced and the building abuts a side lot line. Overall unit-lot densities are therefore increased.
zerofill To fill unused storage locations in an information system (IS) with the representation of the character denoting "0". [INFOSEC-99]
Zeroization A method of erasing electronically stored data, cryptographic keys, and CSPs by altering or deleting the contents of the data storage to prevent recovery…
zeroize To remove or eliminate the key from a crypto-equipment or fill device. [INFOSEC-99]
zeroized Electronically stored data that have been degaussed, erased, or overwritten. [After X9.17]
Zettabyte 1024 (or 1000) exabytes.
Zevalin (ZEV-uh-lin) A monoclonal antibody that is used to treat certain types of B-cell non-Hodgkin lymphoma and is being studied in the treatment and detection…
ZF Zul'Farrak
ZFP Zone Forecast Product
ZG Zul'Gurub
Zheng (jung) In traditional Chinese medicine, a way of diagnosing disease based on observing a set of signs and symptoms.
ziconotide (zih-KAH-noh-tide) A drug used in the treatment of chronic pain. Also called Prialt and SNX 111.
zidovudine A drug that inhibits the human immunodeficiency virus (HIV) that causes AIDS. It is a type of systemic antiviral. Also called AZT.
ZIF Zero Insertion Force.
zig-zag DNA See: Z-DNA.
zileuton A substance that is used to prevent asthma symptoms and that is being studied in the prevention of lung cancer.
zinc finger A DNA-binding protein motif, characterized by two closely spaced cysteine and two histidine residues that serve as ligands for a single Zn2+ ion.
zinc oxide A compound that may enhance immune function, especially when administered by inhalation.
zinc sulfate A substance required for cell growth and tissue repair. It is being studied as a way to prevent or decrease mucositis caused by radiation therapy.
Zinc-finger protein A secondary feature of some proteins containing a zinc atom; a DNA-binding protein.
Zinecard (ZIN-eh-card) A drug used to reduce heart damage in women given doxorubicin for breast cancer that has spread.
ZIP An open standard for compression and decompression used widely for PC download archives.
Zip Drives A brand-name magnetic storage device that can hold between 100 and 250 megabytes of data.
zip file A file used to store compressed versions of files. In connection with Java bytecode files, these have largely been superseded by Java Archive (JAR) files.
zip-cord In optical communications, a two-fiber cable consisting essentially of two single-fiber cables having their jackets conjoined by a strip of jacket…
ZL Freezing Drizzle
ZNS zones
Zofran (ZOH-fran) A drug used to treat nausea and vomiting caused by cancer treatment. It is a type of serotonin receptor antagonist and a type of antiemetic.
zoledronate (zoh-LEH-droh-nayt) A drug used to treat patients with hypercalcemia (high blood levels of calcium) caused by cancer.
zoledronic acid (ZOH-leh-DRON-ik A-sid) A drug used to treat patients with hypercalcemia (high blood levels of calcium) caused by cancer.
Zolinza A drug that is used to treat cutaneous T-cell lymphoma that does not get better, gets worse, or comes back during or after treatment with other drugs.
Zollinger-Ellison syndrome A disorder in which tumors of the pancreatic islet cells produce large amounts of gastrin (a hormone), leading to excess acid in the stomach and…
Zoloft A drug used to treat depression. It is a type of selective serotonin reuptake inhibitor (SSRI). Also called sertraline.
zolpidem (zole-PIH-dem) A drug used to treat insomnia (inability to sleep), and anxiety. It is a type of imidazopyridine (sedative hypnotic). Also called Ambien.
Zombie The classic version is a mindless, frequently violent, product of supernatural magic or pharmacology while the modern incarnation is a reanimated human…
Zometa (ZOH-met-uh) A drug used to treat patients with hypercalcemia (high blood levels of calcium) caused by cancer.
Zona pellucida A thick, transparent noncellular layer that surrounds and protects the oocyte.
Zonal Flow Large-scale atmospheric flow in which the east-west component (i.e., latitudinal) is dominant.
Zonal price A pricing mechanism for a specific zone within a control area.
Zone A geographical area shown on a Flood Hazard Boundary Map or a Flood Insurance Rate Map that reflects the severity or type of flooding in the area.
Zone OCR An add-on feature of the imaging software that populates document templates by reading certain regions or zones of a document, and then placing the text…
Zone of Aeration The comparatively dry soil or rock located between the ground surface and the top of the water table.
zone of elongation The section of the young root or shoot just behind the apical meristem, in which the cells are enlarging and elongating rapidly.
zone of influence The area surrounding a power station that is raised in potential above a remote or true grounding (earthing) point. [T1.318-2000]
zone of protection The space, adjacent to a lightning protection system, that is substantially immune to direct lightning strokes. [After T1.318-2000]
Zone of Saturation The soil or rock located below the top of the ground water table that is saturated with water. See water table.
zone of silence Synonym skip zone.
Zoned earthfill (or zoned embankment) An embankment dam composed of zones of selected materials where the permeability of the material increases to the upstream or downstream face from the…
Zoned Embankment Dam An embankment dam, which is composed of zones of selected materials having different degrees of porosity, permeability, and density.
Zoned fault See Fault, zoned
Zoning The ability of local governments to specify the use of private property in order to control development within designated areas of land.
Zoning Commission Local agencies with jurisdiction to regulate use of properties within their geographic area.
zoo blot Hybridization of cloned DNA from one species to DNA from a range of other organisms to determine the extent to which the cloned DNA is evolutionarily…
zoo FISH Fluorescence in situ hybridization technique, probing metaphase chromosome s of one species with DNA from another species.
zoom To enlarge and display greater detail of a portion of a geographic data set.
zooming The act of changing the scale of a display, generally without changing the amount of screen space it occupies. [T1.232-1996]
Zoomorphic Having or representing animal forms.
Zoonosis A disease that naturally occurs in animals that can also occur in humans.