20-letter words containing or
- llywelyn ap iorwerth — called Llywelyn the Great. died 1240, prince of Gwynedd, N Wales (1194–1238), who extended his rule over most of Wales
- look before you leap — be aware of the risks involved in sth
- lord high chancellor — the highest judicial officer of the British crown: law adviser of the ministry, keeper of the great seal, presiding officer in the House of Lords, etc.
- loyal order of moose — See under moose (def 2).
- magnification factor — the size of a magnified image of an object divided by the size of the object itself
- 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.
- mail transport agent — Message Transfer Agent
- mail-order catalogue — a catalogue of goods you can buy from a particular company by mail order
- make head (n)or tail — If you say that you cannot make head nor tail of something or you cannot make head or tail of it, you are emphasizing that you cannot understand it at all.
- make head or tail of — to attempt to understand (a problem, etc)
- make short shrift of — to dispose of quickly and unsympathetically
- 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.
- meissner's corpuscle — tactile corpuscle.
- memory address space — (architecture) 1. Any part of a processor's address space that is occupied by memory. 2. The range of addresses seen by a memory device relative to the base address at which it is mapped into the processor's address space.
- meta-dichlorobenzene — a colorless liquid, C 6 H 4 Cl 2 , soluble in alcohol and ether: used as a fumigant and insecticide.
- methyl chloroformate — a colorless liquid, C 2 H 3 ClO 2 , used chiefly in organic synthesis.
- microelectrophoresis — any of several techniques for observing, by means of a microscope or an ultramicroscope, the electrophoresis of minute surface particles.
- microsoft networking — (networking) Microsoft's name for the networking subsystems of Windows 95 and later. Not to be confused with The Microsoft Network. Microsoft networking uses the SMB file sharing protocol. It is implemented as file system drivers i.e. "installable file systems" (IFS). The network redirector "Client for Microsoft Networks", is implemented in the VREDIR.VXD virtual device driver. Peer resource sharing is provided by "File and Printer Sharing for Microsoft Networks" (VSERVER.VXD). Windows 95's support for Netware (NCP) networks is provided in a similar way via NWREDIR.VXD and NWSERVER.VXD.
- midcourse correction — a navigational correction made in the course of a ship, airplane, rocket, or space vehicle at some point between the beginning and end of the journey.
- military superiority — the power, strength, or numbers of armed forces of a country viewed as an advantage over another country
- moreton bay chestnut — an Australian leguminous tree, Castanospermum australe, having thin smooth bark and yellow or reddish flowers: used in furniture manufacture
- morning glory family — the plant family Convulvulaceae, characterized by twining herbaceous vines, shrubs, and trees having alternate, simple, or compound leaves, funnel-shaped, often showy flowers, and fruit in the form of a berry or capsule, and including bindweed, dodder, moonflower, morning glory, and sweet potato.
- motor neuron disease — Motor neuron disease is a disease which destroys the part of a person's nervous system that controls movement.
- multistorey car park — a car park consisting of several levels
- mum-and-dad investor — a small-scale non-professional investor
- neon lamp (or tube) — a discharge lamp containing neon, that ionizes and glows with a red light (neon light) when an electric current is sent through it: used esp. in advertising signs
- network transparency — (networking) A feature of an operating system or other service which lets the user access a remote resource through a network without having to know if the resource is remote or local. For example NFS allow users to access remote files as if they were local files.
- night storage heater — a heater or radiator that stores heat at night-time because electricity is cheaper
- non-volatile storage — (storage) (NVS, persistent storage, memory) A term describing a storage device whose contents are preserved when its power is off. Storage using magnetic media (e.g. magnetic disks, magnetic tape or bubble memory) is normally non-volatile by nature whereas semiconductor memories (static RAM and especially dynamic RAM) are normally volatile but can be made into non-volatile storage by having a (rechargable) battery permanently connected. Other examples of non-volatile storage are EEPROM, CD-ROM, paper tape and punched cards.
- noncatalytic reactor — A noncatalytic reactor is a reactor in which no catalyst is used.
- nonsense correlation — a correlation supported by data but having no basis in reality, as between incidence of the common cold and ownership of televisions
- normal magnification — the magnification produced by a telescope or microscope such that the diameter of the exit pupil of the instrument is equal to the diameter of the pupil of the eye.
- 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.
- north atlantic drift — an ocean current flowing NE toward the British Isles, formed by the convergence of the Gulf Stream and the Labrador Current SE of Newfoundland.
- north canadian river — a river in NE New Mexico, E Texas, and E Oklahoma, flowing SE to the Canadian River. 760 miles (1223 km) long.
- north celestial pole — the point of intersection of the earth's extended axis and the northern half of the celestial sphere, lying about 1° from Polaris
- north richland hills — a town in N Texas.
- north temperate zone — the part of the earth's surface between the tropic of Cancer and the Arctic Circle.
- northern leaf blight — a disease of corn caused by the fungus Exsherohilum turcicum, characterized by elongate tan-gray elliptical spots with subsequent blighting and necrosis of leaves.
- northern territories — a territory in N Australia. 523,620 sq. mi. (1,356,175 sq. km). Capital: Darwin.
- northern white cedar — any of several chiefly coniferous trees valued for their wood, especially Chamaecyparis thyoides, of the eastern U.S., or Thuja occidentalis (northern white cedar) of northeastern North America.
- norwegian forest cat — a breed of long-haired cat with a long bushy tail and a long mane
- not mince your words — If you say that someone does not mince their words, you mean that they speak in a forceful and direct way, especially when saying something unpleasant to someone.
- not worth the candle — not worth the price or trouble entailed (esp in the phrase the game's not worth the candle)
- olfactory anesthesia — absence or loss of the sense of smell.
- on (or off) the air — that is (or is not) broadcasting or being broadcast
- on o's best behavior — If someone is on their best behavior, they are trying very hard to behave well.
- on the factory floor — in a factory; as a factory worker
- operator overloading — overloading