polyphenol(PAH-lee-FEE-nol) A substance that is found in many plants and gives some flowers, fruits, and vegetables their color.
Polyphenon E(PAH-lee-FEE-nun ...) A substance being studied in the prevention of cancer. It is made from decaffeinated green tea, and contains chemicals called…
PolyploidA multiple of the haploid chromosome number that results from chromosome replication without nuclear division.
polyposis(PAH-lee-POH-sis) The development of numerous polyps (growths that protrude from a mucous membrane).
polysaccharide(PAH-lee-SA-kuh-ride) A large carbohydrate molecule. It contains many small sugar molecules that are joined chemically. Also called glycan.
polysomeA multi-ribosomal structure representing a linear array of ribosomes held together by mRNA.
polysomnogram(PAH-lee-SOM-noh-gram) A group of recordings taken during sleep that shows brain wave changes, eye movements, breathing rate, blood pressure, heart rate…
polyspermyThe entry of several sperm nuclei into the egg during fertilization, although only one actually fuses with the egg nucleus.
polytene chromosomeGiant chromosomes produced by interphase replication without division, and consisting of many identical chromatid s arranged side by side.
polyunsaturatesOils in which some of the carbon-carbon bonds are not fully hydrogenated - i.e. of the form -CH=CH-, rather than -CH2-CH2-.
Polyuria(Hydruria.) Excessive excretion or discharge of urine.
Polyvalent vaccineA recombinant organism into which has been cloned antigenic determinants from a number of different disease-causing organisms. (See Vaccine.)
Polyvinyl Chloride (PVC)A type of plastic used to make pipe and fittings for water distribution and irrigation.
polyvinylpyrrolidone(Abbreviation: PVP). An occasional constituent of plant tissue culture isolation media.
polyvinylpyrrolidone-sodium hyaluronate gel(PAH-lee-VY-nil-py-ROL-ih-done-SOH-dee-um HY-uh-LOO-roh-nayt ...) A gel used to lessen pain from mouth sores caused by chemotherapy or radiation therapy…
pomalidomide(POH-muh-LIH-doh-mide) A substance being studied in the treatment of prostate cancer, multiple myeloma, and other types of cancer.
POMCUSPre-positioning Of Materiel Configured to Unit Sets.
pomegranateA subtropical shrub or tree. Juice from the fruit may contain substances that decrease or slow the rise of prostate-specific antigen (PSA) levels.
PondA small lake. Water impounded by a diversion dam.
Pond CheckAn analysis by a fisheries biologist of a fish population in a pond. A seine is used to catch fish, catch records are reviewed to determine angler…
Pondage(1) The holding back of water for later release for power development above the dam of a hydroelectric plant to (a) equalize daily or weekly fluctuations…
PondingIn flat areas, runoff collects, or ponds in depression and cannot drain out. Flood waters must infiltrate slowly into the soil, evaporate, or be pumped…
Ponding (or flooding)A method for compacting soil using water added after the soil is in place until free water stands on the surface.
ponsPart of the central nervous system, located at the base of the brain, between the medulla oblongata and the midbrain. It is part of the brainstem.
pontineHaving to do with the pons (part of the central nervous system, located at the base of the brain, between the medulla oblongata and the midbrain).
PoolA deep area of a stream between rapids or where the current is slow.
Pool HeightThe height of the water behind a dam. (Various datums may be used and various pool heights may be used, e.g., conservation pool, flood control pool, etc.)
PoolingCombining of assets of different entities, i.e., two or more counties, for efficient investment purposes while maintaining separate accounting trails.
Pooling Administrator (PA)The term Pooling Administrator refers to the entity or entities responsible for administering a thousands-block number pool (FCC 00-104, ç 52.
POPContraction of "Repopulation", often used as a shortened term for the re-spawn of monsters.
Pop-underA pop-up that appears underneath the currently active web browser window. An annoying, if not shady, tactic used by some web advertisers.
Pop-upA web page that displays within a new, typically smaller, web browser window, rather than the currently active browser window.
POP3This is a computing standard that enables emails to be retrieved from a remote mailbox.
POP3 (Post Office Protocol version 3)A mail protocol that allows clients running it to retrieve mail from a host mail server also running the protocol. You can enable POP3 on a Domino server.
Popcorn ConvectionSlang for showers and thunderstorms that form on a scattered basis with little or no apparent organization, usually during the afternoon in response to…
Popped strandA strand of tape protruding from the edge of a wound tape pack. Print through: The condition where low frequency signals on one tape winding imprint…
popperTop-water plug with a dished-out head designed to make a splash when pulled sharply to imitate a wounded baitfish struggling on the surface.
popular rankingA ranking type that adds to a document's existing ranking based on the document's popularity.
Popular VoteThe result of the votes of the eligible voters. The winner of the popular vote usually wins the election (but not always - sometimes the outcome of the…
Populationthe totality of items or units of material under consideration.
Population at risk (PAR)The population potentially affected by flood waters as a result of large operational releases or dam failure.
Population densityNumber of cells or individuals per unit. The unit could be an area, or a volume of medium.
Population doublingsThe number of times cells growing in vitro have increased the total number of cells by a factor of 2 compared to the initial number of cells.
Population geneticsThe branch of genetics that deals with frequencies of alleles and genotypes in breeding populations.
population study(PAH-pyoo-LAY-shun ...) A study of a group of individuals taken from the general population who share a common characteristic, such as age, sex, or health…
popup menuA menu of actions that is normally not visible on the screen until a mouse button is clicked.
Por SíComparecer en juicio en representación propia sin un abogado.
porcine(POR-sine) Having to do with or coming from pigs.
porcine endogenous retrovirus(Abbreviation: PERV). The provirus of a porcine retrovirus. The possibility that PERVs could be activated after xenotransplantation of pig organs into…
PoreA small to minute opening or interstice in a rock or soil.
Pore PressureThe interstitial pressure of fluid (air or water) within a mass of soil, rock, or concrete.
Pore spacesThe open areas, or spaces, in soil, sediments, and rocks that are filled by air or water.
Pore-water pressureInternal hydrostatic pressure in an embankment caused by the level of water in the reservoir acting through pressure-transmitting paths between soil…
porfimer sodium(PORE-fih-mer SOH-dee-um) A drug used to treat some types of cancer. When absorbed by cancer cells and exposed to light, porfimer sodium becomes active…
porfiromycinA substance that is being studied in the treatment of cancer. It belongs to the family of drugs called anticancer antibiotics.
PorosityThe ratio of the volume of void space to the total volume of an undisturbed sample.
Porous MediaA solid that contains pores; normally, it refers to interconnected pores that can transmit the flow of fluids.
PortAn implanted device through which blood may be withdrawn and drugs may be infused without repeated needle sticks. Also called port-a-cath.
Port CoversMechanism for thrust termination of solid-propellant systems.
port operations serviceA maritime mobile service in or near a port, between coast stations and ship stations, or between ship stations, in which messages are restricted to those…
Port ScanningUsing a program to remotely determine which ports on a system are open (e.g., whether systems allow connections through those ports).
port stationA coast station in the port operations service. [NTIA] [RR]
port-a-cathAn implanted device through which blood may be withdrawn and drugs may be infused without repeated needle sticks. Also called port.
Port-of-EntryPlace (often an airport) where a person requests admission to the U.S. by the DHS, CBP officer. Learn more on the CBP website.
PortabilityPortability is a provision of the INA intended to preserve the legal status of an H-1B worker who is already in the U.S.
portablePortability is the quality of a program that makes it possible to run it on different types of computers.
Portable Batch System (PBS)A job scheduler mechanism supported by GRAM. For more information, see http://www.openpbs.org.
Portable benefitsBenefits or accumulated assets that you can take with you when you leave your employer or switch jobs are described as portable.
Portable Document Format(PDF) An Adobe technology for formatting documents so that they can be viewed and printed using the Adobe Acrobat reader.
portable station1. A station capable of being carried by one or more persons. Note: A portable station usually has a self-contained power source and can be operated while…
Portable VolumesA feature that facilitates the moving of large volumes of documents without requiring copying multiple files.
portal applications catalogA library of portal applications on the IBM® WebSphere® Portal server to which a user has access.
portal hypertension(PAW-til HY-per-TEN-shun) High blood pressure in the vein that carries blood to the liver from the stomach, small and large intestines, spleen, pancreas…
Portal SiteA generic term for any site which provides an entry point to the internet for a significant number of users.
portal veinA blood vessel that carries blood to the liver from the stomach, small and large intestines, spleen, pancreas, and gallbladder.
porterSomeone who "carries" software from one "platform" to another. Porting programs written in platform-dependent languages such as C can be difficult work…
portfolioAll the securities which an investment company or an individual investor owns.
Portfolio managerA portfolio manager is responsible for overseeing a collection of investments, either for an institution - such as a mutual fund, brokerage firm…
Portfolio StandardThe requirement that an electric power provider generate or purchase a specified percentage of the power it supplies/sells from renewable energy…
Portfolio turnoverPortfolio turnover is the rate at which a mutual fund manager buys or sells securities in a fund, or an individual investor buys and sells securities in a…
PorticoA small porch composed of a roof supported by columns, often found in front of a doorway.
Portrait ModeA display where the height exceeds the width.
PoseidonClass of US nuclear ballistic submarines (USN term).
position effectThe influence of the location of a gene (particularly a transgene ) on its expression and hence its effect on phenotype.
positional candidate geneA gene known to be located in the same region as a DNA marker that has been shown to be linked to a single-locus trait or to a QTL, and whose deduced…