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18-letter words containing c, h, o, l, a

  • logarithmic spiral — log r = aθ
  • logical shift left — logical shift
  • lonely hearts club — a club for people who are trying to find a lover or a friend
  • louisiana purchase — a treaty signed with France in 1803 by which the U.S. purchased for $15,000,000 the land extending from the Mississippi River to the Rocky Mountains and from Canada to the Gulf of Mexico.
  • lower palaeolithic — the earliest of the three sections of the Palaeolithic, beginning about 3 million years ago and ending about 70 000 bc with the emergence of Neanderthal man
  • magnetorheological — (physics) describing a substance whose rheological properties are modified by a magnetic field.
  • malicious mischief — willful destruction of personal property motivated by ill will or resentment toward its owner or possessor.
  • marine archaeology — the branch of archaeology that deals with the recovery of ancient objects found beneath the sea, as shipwrecks or remains from submerged islands, and with the techniques of underwater exploration, excavation, and retrieval.
  • mathematical error — a mistake in a mathematical calculation, etc
  • mathematical logic — symbolic logic.
  • mathematical model — a representation of a system, process, etc, in mathematical terms
  • menthol cigarettes — cigarettes that are flavoured with menthol
  • mergui archipelago — a group of over 200 islands in the Andaman Sea, off the Tenasserim coast of S Myanmar: mountainous and forested
  • methylcyclohexanol — a colorless, aromatic, viscous liquid mixture, chiefly of the ortho and para forms of CH 3 C 6 H 1 0 OH, derived from cresol by hydrogenation: used chiefly as a solvent for rubber, cellulose, esters, and phenols.
  • middle paleolithic — See under Paleolithic.
  • moccasin telegraph — the transmission of rumour or secret information; the grapevine
  • modular arithmetic — arithmetic in which numbers that are congruent modulo a given number are treated as the same. Compare congruence (def 2), modulo, modulus (def 2b).
  • monte carlo method — a technique for numerically approximating the solution of a mathematical problem by studying the distribution of some random variable, often generated by a computer.
  • mozambique channel — a channel in SE Africa, between Mozambique and Madagascar. 950 miles (1530 km) long; 250–550 miles (400–885 km) wide.
  • mucopolysaccharide — (formerly) glycosaminoglycan.
  • muscular dystrophy — a hereditary disease characterized by gradual wasting of the muscles with replacement by scar tissue and fat, sometimes also affecting the heart.
  • negative cash flow — the situation when income is less than payments
  • neurophysiological — the branch of physiology dealing with the functions of the nervous system.
  • neuropsychological — Of or pertaining to neuropsychology, the relation or combination of brain and mind.
  • nonachlorobiphenyl — (organic compound) Either of three isomers of the polychlorinated biphenyl containing nine chlorine atoms.
  • noninterchangeable — That cannot be interchanged with another.
  • nonpharmacological — Not pharmacological.
  • not to have a clue — to be completely baffled
  • oath of allegiance — pledge to one's nation
  • octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
  • oil of catechumens — holy oil used in baptism, the ordination of a cleric, the coronation of a sovereign, or in the consecration of a church.
  • ophthalmologically — In an ophthalmological manner.
  • optical brightener — an additive that dyes and brightens fabric or paper
  • oriental cockroach — a dark-brown cockroach, Blatta orientalis, thought to have originated in Asia but now nearly cosmopolitan in distribution.
  • orthophthalic acid — Chemistry. any of three isomeric acids having the formula C 8 H 6 O 4 , especially the ortho isomer (orthophthalic acid) a colorless, crystalline, slightly water-soluble solid used chiefly in the manufacture of dyes, medicine, and perfume.
  • oscillographically — By means of oscillography.
  • palmer archipelago — a group of islands in the South Atlantic Ocean, off the NW coast of the Antarctic Peninsula.
  • pathologic anatomy — the branch of pathology dealing with the morphologic changes in tissues.
  • phanerocrystalline — (of a rock) having the principal constituents in the form of crystals visible to the naked eye.
  • phantasmagorically — having a fantastic or deceptive appearance, as something in a dream or created by the imagination.
  • philharmonic pitch — a standard of pitch in which A above middle C is established at 440 vibrations per second.
  • photochemical smog — air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust.
  • physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
  • physical geography — the branch of geography concerned with natural features and phenomena of the earth's surface, as landforms, drainage features, climates, soils, and vegetation.
  • physical inventory — To carry out a physical inventory is to count all the stock on hand.
  • policeman's helmet — a Himalayan balsaminaceous plant, Impatiens glandulifera, with large purplish-pink flowers, introduced into Britain
  • polychromatophilic — having an affinity for more than one kind of stain, especially for acid, neutral, and basic stains, as polychromatophilic erythroblasts characteristic of pernicious anemia.
  • positively charged — having a positive charge
  • potassium chlorate — a white or colorless, crystalline, water-soluble, poisonous solid, KClO 3 , used chiefly as an oxidizing agent in the manufacture of explosives, fireworks, matches, bleaches, and disinfectants.
  • potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
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