13-letter words that end in is
- magnetic axis — the straight line joining the two poles of a magnet, as the poles of the earth
- mare frigoris — (Sea of Cold) a dark plain in the northern hemisphere, in the first and second quadrants of the face of the moon: about 55 miles (90 km) wide at its narrowest width and 750 miles (1200 km) long: about 67,000 sq. mi. (174,000 sq. km).
- mare nectaris — (Sea of Nectar) a dark plain in the fourth quadrant of the face of the moon: about 26,000 sq. mi. (67,000 sq. km).
- matthew paris — Matthew, Matthew of Paris.
- melanogenesis — the production of melanin
- meta-analysis — a research study that combines and analyzes statistics gathered from multiple independent studies
- metamorphosis — Biology. a profound change in form from one stage to the next in the life history of an organism, as from the caterpillar to the pupa and from the pupa to the adult butterfly. Compare complete metamorphosis.
- microanalysis — Chemistry. the analysis of very small samples of substances.
- microsoft iis — Internet Information Server
- mononucleosis — the presence of an abnormally large number of mononuclear leukocytes, or monocytes, in the blood.
- morphogenesis — the development of structural features of an organism or part.
- mycoplasmosis — a disease in animals and humans caused by mycoplasma
- mycotoxicosis — poisoning resulting from exposure to fungal toxins.
- myelofibrosis — the replacement of bone marrow by fibrous tissue, characteristic of leukemia and certain other diseases.
- narcoanalysis — a method of psychological investigation in which the conscious or unconscious unwillingness of a subject to express memories or feelings is diminished by the use of a barbiturate drug.
- narcohypnosis — the use of drugs to induce hypnosis
- neuromyelitis — (pathology) inflammation of both the spinal cord and nerves.
- neurosyphilis — Syphilis that involves the central nervous system.
- nullius juris — (especially in old English law) of no legal force.
- nunc dimittis — (italics) the canticle beginning with the words of Simeon, in Luke 2:29–32, “Lord, now lettest thou thy servant depart in peace.”.
- odontogenesis — the development of teeth.
- onychomycosis — Fungal infection of the nail, especially the toenail.
- onychorrhexis — (pathology) fingernail and toenail brittleness and breakage, such as may be due to excessive strong soap and water exposure, nail polish remover, hypothyroidism, anemia, anorexia nervosa or bulimia, or after oral retinoid therapy.
- ora pro nobis — a Latin invocation meaning pray for us
- organogenesis — Biology. the origin and development of an organ.
- osteofibrosis — loss of calcium from the bones, causing them to become fragile
- osteomyelitis — an inflammation of the bone and bone marrow, usually caused by bacterial infection.
- osteopetrosis — any of several hereditary diseases characterized by increased bone density.
- osteophytosis — Lb medicine The presence of osteophytes.
- overdiagnosis — excessive diagnosis of a disease
- paddle tennis — a game combining elements of tennis and handball, played with paddles and a rubber ball on a screened court about half the size of and having a lower net than a tennis court.
- para-centesis — puncture of the wall of a cavity to drain off fluid.
- parapsychosis — an abnormal psychosis
- parasymbiosis — the symbiotic relationship that occurs between certain species of fungi and lichens (which are themselves symbiotic associations between a fungus and an alga)
- parasynthesis — the formation of a word by the addition of a derivational suffix to a phrase or compound, as of greathearted, which is great heart plus -ed.
- pas de calais — a department of N France, in Nord-Pas-de-Calais region, on the Straits of Dover (the Pas de Calais): the part of France closest to the British Isles. Capital: Arras. Pop: 1 451 307 (2003 est). Area: 6752 sq km (2633 sq miles)
- pas-de-calais — French name of the Strait of Dover.
- paucis verbis — in or by few words; with brevity.
- periarteritis — inflammation of the outer coat and tissues surrounding an artery.
- perigastritis — the inflammation of the part of the peritoneum surrounding the stomach
- perihepatitis — the inflammation of the part of the peritoneum surrounding the liver
- perinephritis — the inflammation of the perinephrium
- periodontitis — inflammation of the periodontium caused by bacteria that infect the roots of teeth and the surrounding gum crevices, producing bleeding, pus formation, and gradual loss of bone and the tissues that support the teeth. Compare pyorrhea (def 2).
- periodontosis — rapidly advancing juvenile periodontitis.
- perityphlitis — the inflammation of the tissue surrounding the caecum
- philippopolis — Greek name of Plovdiv.
- photophoresis — the move away from a strong light source by previously suspended particles in a gas
- phytocoenosis — the plants of a given area considered as a whole.
- piroplasmosis — babesiosis.
- platykurtosis — the state of being platykurtic.