Glossary
Terms starting with M
330 definitions · page 3 of 6.
- meiosis
- Two successive nuclear divisions (with corresponding cell divisions) that produce haploid gametes (in animals) or haploid sexual spores (in plants and fungi) having one-half of the genetic material of the original cell. The nuclear and cell division process…
- meiospore
- Cell that is one of the products of meiosis in plants.
- Melanin
- The black pigment found in hair or skin.
- Melanoma
- A type of skin cancer characterized by a black or dark brown pigmented tumor.
- Melba
- The name given to various dishes dedicated to Dame Nellie Melba, the famous 19th-century Australian opera singer. The best known is Peach Melba, created by the famous chef Escoffier when he was chef at the Savoy in London to celebrate her visit to London…
- melody
- (1) The aspect of music having to do with the succession of single notes in a coherent arrangement; (2) a particular succession of such notes (also referred to as tune, theme, or voice).
- melting of DNA
- Denaturation of duplex DNA by heat or increased pH leading to strand separation.
- Memo Function
- Allows you to save whatever image is on the screen for viewing at a later time. You can save up to 6 screen images that can be displayed simultaneously, or one at a time on the right half of the TV screen.
- Memorandum
- Sometimes also referred to as a "Bidder Acknowledgment," or "Broker Acknowledgment," the memorandum is signed by those parties either on the auction floor or in the contract room.
- Mendel s first law
- The two members of a gene pair segregate from each other during meiosis; each gamete has an equal probability of obtaining either member of the gene pair.
- Mendel s second law
- The law of independent assortment; unlinked or distantly linked segregating gene pairs assort independently at meiosis.
- Mendelian ratio
- A ratio of progeny phenotypes reflecting the operation of Mendel's laws.
- Mentor
- An employee who has been with a company for a substantial number of years and who counsels one or more new members of staff (or sometimes members of staff in lower positions) in order to help guide their careers. A mentor can either be formal, where the…
- MENU MIX
- The percentage of sales volume each item in your restaurant represents in a given week. This number is calculated by determining the number of each menu item sold in a typical week and then multiplying that number by the menu price and then dividing that…
- meridian
- an imaginary circle on the celestial sphere that connects the zenith to the north (or south) celestial pole
- Meringue
- Meringue refers to a mixture of whipped egg whites and sugar and the light sweet confections made from this mixture when it's oven-baked. Recipes might call for a specific type of meringue. The three main types are: ordinary meringue (the simplest, sometimes…
- mermaid
- This skirt hugs the body until it reaches the knees or just below and then ends in a dramatic flare.
- merozygote
- A bacterial cell having a second copy of a particular chromosomal region in the form of an exogenote. A partially diploid Escherichia coli cell formed from a complete chromosome (the endogenote) plus a fragment (the exogenote).
- Mesclun
- This is the name given to a mixture of salad greens. The term comes from the Provençal word for 'mixture' and refers to a mix of young field greens such as wild and cultivated chicory, lamb's lettuce and dandelion leaves, but may also include rocket…
- Mesh or Mesh Style
- A chain that is fabric-like and woven of fine wire.
- Meson
- A hadron made from an even number of quark-antiquark constituents. The basic structure of most meson is one quark and one antiquark.
- messenger RNA (mRNA)
- An RNA molecule transcribed from the DNA of a gene, and from which a protein is translated by the action of ribosomes. The basic function of the nucleotide sequence of mRNA is to determine the amino acid sequence in proteins.
- Messier Catalog
- A catalog of 107 bright deep-sky objects that belong to a catalog compiled by French astronomer Charles Messier in the 1700s
- Messier objects
- A catalog of 107 bright deep-sky objects that belong to a catalog compiled by French astronomer Charles Messier in the 1700s
- Met
- Methionine (an amino acid).
- Meta search engine
- a search engine that displays results from multiple search engines.
- META tag generator
- tool that will output META tags based on input page information.
- META tags
- tags to describe various aspects about a Web page.
- metabolism
- The chemical reactions that occur in a living cell.
- metacentric chromosome
- A chromosome having its centromere in the middle. See also acrocentric chromosome
- metafemale
- A fruit fly with an X chromosome:Autosome ratio greater than unity.
- metagon
- An RNA necessary for the maintenance of mu particles in Paramecium.
- metamale
- A fruit fly with X chromosome:Autosome ratio below 0.5.
- metamere
- Segmental repeat unit in higher animals.
- metaphase
- The stage of mitosis or meiosis in which spindle fibers are attached to kinetochores and the chromosomes are positioned in the equatorial plane of the cell. An intermediate stage of nuclear division when chromosomes align along the equatorial plane of the…
- metaphase plate
- The plane of the equator of the spindle into which chromosomes are positioned during metaphase.
- metastasis
- The migration of cancerous cells to other parts of the body.
- meteor
- a flash of light that occurs when a meteoroid burns up in Earth’s atmosphere; also popularly known as a shooting star
- meteor shower
- a period of enhanced meteor activity that occurs when Earth collides with a swarm of meteoroids; an individual shower happens at the same time each year and has all its meteors appearing to radiate from a common point
- meteor showers
- a period of enhanced meteor activity that occurs when Earth collides with a swarm of meteoroids; an individual shower happens at the same time each year and has all its meteors appearing to radiate from a common point
- meteor storm
- Meteor storms are rare events that occur when Earth encounters dense regions within a meteor stream. Such encounters can increase normal meteor rates by more than 1,000 meteors per minute.
- meteorite
- a rock from space that survives passage through Earth’s atmosphere and falls to the ground
- meter
- The organization of strong and weak beats into a regular, recurring pattern.
- METER
- A device for measuring levels and volumes of a customerós gas and electricity use.
- METHANE
- A light hydrocarbon that is the main component of natural gas and marsh gas. It is the product of the anaerobic decomposition of organic matter, enteric fermentation in animals and is one of the greenhouse gases. Chemical formula is CH4.
- METHANE (CH4)
- the simplest of hydrocarbons and the principal constituent of natural gas. Pure methane has a heating value of 1,1012 Btu per standard cubic foot.
- METHANOL (also known as Methyl Alcohol Wood Alcohol CH3OH)
- a liquid formed by catalytically combining carbon monoxide (CO) with hydrogen (H2) in a 1:2 ratio, under high temperature and pressure. Commercially it is typically made by steam reforming natural gas. Also formed in the destructive distillation of wood.
- METHANOL (also known as Methyl Alcohol, Wood Alcohol, CH3OH)
- a liquid formed by catalytically combining carbon monoxide (CO) with hydrogen (H2) in a 1:2 ratio, under high temperature and pressure. Commercially it is typically made by steam reforming natural gas. Also formed in the destructive distillation of wood.
- METHYL TERTIARY BUTYL ETHER (MTBE)
- an ether manufactured by reacting methanol and isobutylene. The resulting ether has a high octane and low volatility. MTBE is a fuel oxygenate and is permitted in unleaded gasoline up to a level of 15 percent. It is one of the primary ingredients in…
- methylation
- Modification of a molecule by the addition of a methyl group.
- metronome
- Mechanical (or, today, electrical) device that ticks (or blinks) out regular tempos from about 40 to 208 beats per minute.
- metronome marking
- A number, usually placed at the top of a piece, that indicates tempo by telling how many beats of a certain note value will be heard per minute, for example, J = 60.
- Meunière (à la)
- A method of cooking fish. This method is traditionally used to prepare whole trout and fillets of sole. The fish is coated in seasoned flour, fried in butter and served with some more melted butter with the addition of a squeeze of lemon juice and a few…
- mezzo
- (met-zoh) Medium, as in mezzopiano (medium soft).
- MHz
- MegaHertz = 1.000.000 Hertz
- Microsoft Access
- Microsoft's low-end relational database included with the MS Office suite. Here is the official site for Microsoft Access. Cheaper NT hosting plans sometimes include MS Access database.
- Microsoft FoxPro
- Microsoft's RAD tool for creating relational databases. FoxPro is a part of Microsoft's Visual Studio. Here is the official MS FoxPro site.
- Microsoft SQL Server
- Microsoft's high-end SQL database running on Windows systems. Here is the official Microsoft SQL Server site.
- microtones
- Intervals smaller than a half step.
- microtubules
- Hollow cylinders made of the protein tubulin that form, among other things, the spindle fibers.