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18-letter words containing r, h, a, p

  • lipopolysaccharide — any of a class of polysaccharides to which lipids are attached.
  • lithostratigraphic — Of or pertaining to lithostratigraphy.
  • logarithmic spiral — log r = aθ
  • 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
  • lubber grasshopper — plains grasshopper.
  • many happy returns — When it is someone's birthday, people sometimes say 'Many happy returns' to them as a way of greeting them.
  • maternity hospital — birthing facility
  • mergui archipelago — a group of over 200 islands in the Andaman Sea, off the Tenasserim coast of S Myanmar: mountainous and forested
  • metamorphic facies — Geology. a group of metamorphic rock units characterized by particular mineralogic associations.
  • methylated spirits — ethyl alcohol denatured with methyl alcohol for the purpose of preventing its use as an alcoholic beverage.
  • miniature pinscher — one of a German breed of toy dogs resembling a smaller version of the Doberman pinscher, having a flat skull, a smooth coat, erect ears, and a docked tail, bred originally as a watchdog.
  • moccasin telegraph — the transmission of rumour or secret information; the grapevine
  • monographic series — a series of monographs issued in uniform style or format and related by subject or by issuing agency.
  • monophosphorylated — (biochemistry) phosphorylated with a single unit of phosphoric acid.
  • morphine addiction — the fact or condition of being addicted to morphine
  • 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.
  • natural philosophy — natural science.
  • nebular hypothesis — the theory that the solar system evolved from a mass of nebular matter: prominent in the 19th century following its precise formulation by Laplace.
  • neo-pythagoreanism — a philosophical system, established in Alexandria and Rome in the second century b.c., consisting mainly of revived Pythagorean doctrines with elements of Platonism and Stoicism.
  • neuroophthalmology — the branch of ophthalmology that deals with the optic nerve and other nervous system structures involved in vision.
  • neurophysiological — the branch of physiology dealing with the functions of the nervous system.
  • neuropsychodynamic — Of or pertaining to neuropsychodynamics.
  • 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.
  • nonpharmacological — Not pharmacological.
  • north polar region — the region of land and water surrounding the North Pole.
  • north truchas peak — a mountain in N New Mexico, near Santa Fe: one of the three Truchas Peaks. 13,110 feet (3999 meters).
  • not a pretty sight — If you say that someone or something is not a pretty sight, you mean that it is not pleasant to look at.
  • octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
  • offset lithography — offset (def 6).
  • open heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
  • open-heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
  • optical brightener — an additive that dyes and brightens fabric or paper
  • 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.
  • outer automorphism — an automorphism that is not an inner automorphism.
  • outreach programme — a programme designed to help and encourage disadvantaged members of the community
  • overhead projector — over one's head; aloft; up in the air or sky, especially near the zenith: There was a cloud overhead.
  • paint the town red — a substance composed of solid coloring matter suspended in a liquid medium and applied as a protective or decorative coating to various surfaces, or to canvas or other materials in producing a work of art.
  • pairs championship — an event in a sport such as tennis or darts open to pairs of competitors
  • palaeoanthropology — the branch of anthropology concerned with primitive man
  • palm beach gardens — a city in SE Florida, near North Palm Beach.
  • palmer archipelago — a group of islands in the South Atlantic Ocean, off the NW coast of the Antarctic Peninsula.
  • paper handkerchief — a handkerchief made from tissue paper
  • par for the course — an equality in value or standing; a level of equality: The gains and the losses are on a par.
  • parachute regiment — an airborne regiment of an army
  • paraglyph printing — the printing of the positive and negative of a radiograph superimposed in slight misalignment to give the effect of a relief.
  • parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
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