13-letter words containing s, i, m, o
- paedomorphism — the continuation of juvenile characteristics in the adult stage
- pamlico sound — a sound between the North Carolina mainland and coastal islands.
- pan-teutonism — Pan-Germanism.
- papillomatous — a benign tumor of the skin or mucous membrane consisting of hypertrophied epithelial tissue, as a wart.
- paramyxovirus — any of various RNA-containing viruses that are similar to but larger than the myxoviruses, including the viruses that cause mumps, measles, parainfluenza, and Newcastle disease.
- parasitoidism — the feeding by certain insect larvae on host tissues such that the host remains alive until larval development is complete and then usually dies.
- parasymbiosis — the symbiotic relationship that occurs between certain species of fungi and lichens (which are themselves symbiotic associations between a fungus and an alga)
- paris commune — commune3 (def 8).
- pathomorphism — abnormal morphology.
- pembrokeshire — a historic county in Dyfed, in SW Wales.
- pentatonicism — the use of a five-tone scale.
- perfectionism — any of various doctrines holding that religious, moral, social, or political perfection is attainable.
- perimenopause — the period leading up to the menopause during which some of the symptoms associated with menopause may be experienced
- persian melon — a round variety of muskmelon having a green, reticulate, unribbed rind and orange flesh.
- phenomenalism — the doctrine that phenomena are the only objects of knowledge or the only form of reality.
- phonocamptics — the branch of acoustics dealing with echoes
- photochromism — the reversible transformation of something's colour due to exposure to electromagnetic radiation such as sunlight
- photodynamics — the science dealing with light and its effects on living organisms.
- photoemission — photoelectric effect.
- physharmonica — a keyboard musical instrument fitted with free reeds, and which is an early form of harmonium
- physics model — a variety of software illustrating the movement of objects in reality, used by designers of video games to improve verisimilitude
- physiognomies — the face or countenance, especially when considered as an index to the character: a fierce physiognomy.
- physostigmine — an alkaloid, C 1 5 H 2 1 N 3 O 2 , used in the treatment of Alzheimer's disease to raise the level of the neurotransmitter acetylcholine and also as a miotic in glaucoma.
- pianississimo — (of a piece of music) to be played even more quietly or softly than pianissimo; abbreviated as ppp
- piers plowman — (The Vision Concerning Piers Plowman) an alliterative poem written in three versions (1360–99), ascribed to William Langland.
- piroplasmosis — babesiosis.
- pistol shrimp — any common shrimp of the family Alphaeidae, distinguished by the snapping sound made by its enlarged claw.
- plagiostomous — plagiostome
- plagiotropism — plagiotropic tendency or growth.
- plasmodiocarp — a fruiting body of certain myxomycetes.
- plastic money — credit cards, used instead of cash
- plimsoll line — load line (def 1).
- plimsoll mark — load-line mark.
- plus or minus — You use plus or minus to give the amount by which a particular number may vary.
- pneumatolysis — the process by which rocks are altered or minerals and ores are formed by the action of vapors given off by magma.
- pneumogastric — of or relating to the lungs and stomach.
- pococurantism — a careless or indifferent person.
- points system — a system used to assess applicants' eligibility for local authority housing, based on (points awarded for) such factors as the length of time the applicant has lived in the area, how many children are in the family, etc
- poison sumach — an anacardiaceous swamp shrub, Rhus (or Toxicodendron) vernix of the southeastern US, that has greenish-white berries and causes an itching rash on contact with the skin
- poliomyelitis — an acute viral disease, usually affecting children and young adults, caused by any of three polioviruses, characterized by inflammation of the motor neurons of the brain stem and spinal cord, and resulting in a motor paralysis, followed by muscular atrophy and often permanent deformities.
- polydaemonism — the belief in many evil spirits.
- polynomialism — a polynomial naming system
- polyoma virus — a small DNA-containing virus, of the papovavirus group, that can produce a variety of tumors in mice, hamsters, rabbits, and rats.
- polyribosomal — relating to a polyribosome
- polysyllabism — a polysyllabic style or the use of multisyllabic words
- polysyllogism — an argument made up of a chain of syllogisms, the conclusion of each being a premise of the one following, until the last one.
- pommes frites — French fries
- pons asinorum — a geometric proposition that if a triangle has two of its sides equal, the angles opposite these sides are also equal: so named from the difficulty experienced by beginners in mastering it. Euclid, 1:5.
- popular music — music having wide appeal, esp characterized by lightly romantic or sentimental melodies
- post feminist — relating to or occurring in the period after the feminist movement of the 1970s.