20-letter words containing o, h, a, r

magnetoencephalogram — a record of the magnetic field of the brain. Abbreviation: MEG.
magnetohydrodynamics — the branch of physics that deals with the motion of electrically conductive fluids, especially plasmas, in magnetic fields. Abbreviation: MHD.
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.
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.
mannitol hexanitrate — a colorless, crystalline, water-insoluble, explosive solid, C 6 H 8 N 6 O 1 8 , used as a fulminating agent in percussion caps and in the treatment of hypertension and coronary insufficiency.
master of the revels — an English court official from the late 15th to early 18th centuries responsible to the Lord Chamberlain for overseeing and paying for court entertainments.
measure one's length — to fall, lie, or be thrown down at full length
membranous labyrinth — an intricate combination of paths or passages in which it is difficult to find one's way or to reach the exit. Synonyms: maze, network, web.
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.
mischaracterizations — Plural form of mischaracterization.
moreton bay chestnut — an Australian leguminous tree, Castanospermum australe, having thin smooth bark and yellow or reddish flowers: used in furniture manufacture
mother of the chapel — (in British trade unions in the publishing and printing industries) a woman shop steward
mother-of-pearl moth — a pyralid moth, Pleuroptya ruralis, having a pale sheen, that is often seen around nettles, on which its green larvae feed
multistep hydroplane — a motorship having a flat bottom built as a series of planes inclined forward, the ship planing on each from stem to stern as its speed increases.
near someone's heart — dear or important to someone
neighbourhood warden — a person employed by a local authority to patrol residential areas and deal with antisocial behaviour
nephroangiosclerosis — (pathology) sclerosis of the renal arterioles.
neurophysiologically — In terms of, or with regard to, neurophysiology.
neuropsychiatrically — In terms of neuropsychiatry.
neuropsychologically — In terms of or by means of neuropsychology.
night storage heater — a heater or radiator that stores heat at night-time because electricity is cheaper
nondirective therapy — client-centered therapy.
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 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.
not worth the candle — not worth the price or trouble entailed (esp in the phrase the game's not worth the candle)
occupation franchise — the right of a tenant to vote in national and local elections
occupational therapy — a form of therapy in which patients are encouraged to engage in vocational tasks or expressive activities, as art or dance, usually in a social setting.
off the beaten track — formed or shaped by blows; hammered: a dish of beaten brass.
off-the-job training — training which is carried out away from your normal place of work
officer of the guard — an officer, acting under the officer of the day, who is responsible for the instruction, discipline, and performance of duty of the guard in a post, camp, or station. Abbreviation: OG, O.G.
officer of the watch — the officer primarily responsible for the navigation of a ship, in the absence of the captain, during a certain watch.
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 drawing board — in the planning stage
on the factory floor — in a factory; as a factory worker
on the starboard bow — within 45 degrees to the starboard of straight ahead
one's heart's desire — If you say that someone or something is your heart's desire, you mean that you want that person or thing very much.
one's spiritual home — Your spiritual home is the place where you feel that you belong, usually because your ideas or attitudes are the same as those of the people who live there.
ophthalmodynamometer — a device for determining the nearest point of ocular convergence.

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