20-letter words containing c, l, e, m, n
- magneto-optical disk — (hardware, storage) (MO) A plastic or glass disk coated with a compound (often TbFeCo) with special optical, magnetic and thermal properties. The disk is read by bouncing a low-intensity laser off the disk. Originally the laser was infrared, but frequencies up to blue may be possible giving higher storage density. The polarisation of the reflected light depends on the polarity of the stored magnetic field. To write, a higher intensity laser heats the coating up to its Curie point, allowing its magnetisation to be altered in a way that is retained when it has cooled. Although optical, they appear as hard drives to the operating system and do not require a special filesystem (they can be formatted as FAT, HPFS, NTFS, etc.). The initial 5.25" MO drives, introduced at the end of the 1980s, were the size of a full-height 5.25" hard drive (like in IBM PC XT) and the disks looked like a CD-ROM enclosed in an old-style cartridge In 2006, a 3.5" drive has the size of 1.44 megabyte diskette drive with disks about the size of a regular 1.44MB floppy disc but twice the thickness.
- magnetoencephalogram — a record of the magnetic field of the brain. Abbreviation: MEG.
- mail exchange record — (messaging) (MX Record) A DNS resource record type that says which SMTP server handles electronic mail for a particular domain. E.g. the MX record foo.co.uk. 1054 IN MX 10 mail.foo.co.uk. means that mail for an address like "[email protected]" should be sent to "mail.foo.co.uk". There can be several servers for a domain. The "10" is a priority - the server with the lowest number will be tried first.
- malpighian corpuscle — Also called kidney corpuscle, Malpighian body. the structure at the beginning of a vertebrate nephron, consisting of a glomerulus and its surrounding Bowman's capsule.
- manuel avila camacho — Manuel Ávila [mah-nwel ah-vee-lah] /mɑˈnwɛl ˈɑ viˌlɑ/ (Show IPA). Manuel Avila Camacho.
- margaret of scotland — Saint. 1045–93, queen consort of Malcolm III of Scotland. Her piety and benefactions to the church led to her canonization (1250). Feast days: June 10, Nov 16
- material equivalence — equivalence (def 4b).
- material implication — equivalence (def 4a).
- material-equivalence — the state or fact of being equivalent; equality in value, force, significance, etc.
- maternal health care — care for the health of a pregnant woman provided by a hospital or health centre
- mechanical advantage — the ratio of output force to the input force applied to a mechanism.
- mechanical impedance — impedance (def 2).
- mechanical-impedance — Electricity. the total opposition to alternating current by an electric circuit, equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usually expressed in ohms. Symbol: Z.
- mecklenburg-schwerin — a former state in NE Germany, formed in 1934 from two states (Mecklenburg-Schwerin and Mecklenburg-Strelitz)
- mecklenburg-strelitz — a former state in NE Germany, formed in 1934 from two states (Mecklenburg-Schwerin and Mecklenburg-Strelitz)
- media access control — (networking) (MAC) The lower sublayer of the OSI data link layer. The interface between a node's Logical Link Control and the network's physical layer. The MAC differs for various physical media. See also MAC Address, Ethernet, IEEE 802.3, token ring.
- medical practitioner — doctor
- medical underwriting — Medical underwriting is the use of medical or health status information in the evaluation of an applicant for life or health insurance.
- meissner's corpuscle — tactile corpuscle.
- menstrual extraction — an abortion procedure involving suction aspiration of the uterine contents early in gestation, before the first missed menstrual period: sometimes performed later.
- meta-dichlorobenzene — a colorless liquid, C 6 H 4 Cl 2 , soluble in alcohol and ether: used as a fumigant and insecticide.
- methylbenzyl acetate — methylphenylcarbinyl acetate.
- microcrystalline wax — Microcrystalline wax is a wax used as a stiffening agent and as a coating agent for tablets and capsules.
- middle-distance race — a race of a length between the sprints and the distance events, esp the 800 metres and the 1500 metres
- mitral insufficiency — abnormal closure of the mitral valve resulting in regurgitation of blood into the atrium and leading to reduced heart function or heart failure.
- mobile phone chicken — a highly dangerous game in which a person is challenged to perform a hazardous stunt which he or she films with a camera phone
- molecular gastronomy — an approach to cooking in which a chef’s knowledge of physics, chemistry, and biology allows him or her to experiment with unusual flavour combinations and cooking techniques
- molecular geneticist — a specialist in the study of the molecular constitution of genes and chromosomes
- mollweide projection — homolographic projection.
- multicast addressing — Ethernet addressing scheme used to send packets to devices of a certain type or for broadcasting to all nodes. The least significant bit of the most significant byte of a multi-cast address is one.
- multiple inheritance — (programming) In object-oriented programming, the possibility that a class may have more than one direct superclass in the class hierarchy. The opposite is single inheritance.
- multiplication table — Arithmetic. a tabular listing of the products of any two numbers of a set, usually of the integers 1 through 10 or 1 through 12.
- navigable semicircle — the less violent half of a cyclone; the half blowing in the direction opposite to that in which the cyclone is moving and in which a vessel can run before the wind.
- neapolitan ice cream — variously flavored and colored ice cream and ice mixtures frozen in layers.
- neuromusculoskeletal — (medicine) Describing the interactions between nerves, muscles and the skeleton.
- new jerusalem church — a sect founded in 1787, based on Swedenborgianism
- newcastle-under-lyme — a town in W central England, in Staffordshire. Pop: 74 427 (2001)
- no lack of something — If you say there is no lack of something, you are emphasizing that there is a great deal of it.
- nonrepeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
- normal zeeman effect — the dividing of a spectral line or lines as a result of placing a radiation source in a magnetic field. The division consists of three equally spaced lines (normal Zeeman effect) in systems for which the spin quantum number is zero, or of three or more unequally spaced lines (anomalous Zeeman effect) in systems for which the spin quantum number is not zero.
- north american plate — a major tectonic division of the earth's crust, comprising Greenland and the continent of North America and the suboceanic Labrador and North American Basins, and bounded on the east by the Mid-Atlantic Ridge, on the south by the Caribbean and South American Plates, and on the west by the San Andreas fault and Aleutian Trench.
- nummulitic limestone — limestone composed predominantly of fossil nummulites.
- object role modeling — (programming) (ORM) A conceptual modelling approach that pictures the application world as a set of objects that play roles (parts in relationships, which may be unary, binary or higher order). ORM provides both graphical and textual languages that enable models to be expressed naturally. For data modelling purposes, its graphical language is more expressive than ER or UML.
- objective complement — object complement.
- omega-minus particle — a baryon with strangeness −3, isotopic spin 0, and negative charge; predicted from the mathematics of the Eightfold Way and subsequently discovered. Symbol: Ω −.
- ontological argument — an a priori argument for the existence of God, asserting that as existence is a perfection, and as God is conceived of as the most perfect being, it follows that God must exist; originated by Anselm, later used by Duns Scotus, Descartes, and Leibniz.
- optical mark reading — the reading of marks by an optical device whereby the information can be stored in machine-readable form
- pale western cutworm — the larva of a noctuid moth, Agrotis orthogonia, of the western U.S. and Canada, that seriously damages grains, beets, potatoes, alfalfa, etc., by feeding underground on roots and stems.
- particle beam weapon — a weapon that fires particle beams into the atmosphere or space
- peremptory challenge — a formal objection to the service of a juror by a party to a criminal prosecution or a civil action that requires no showing of cause.