13-letter words that end in m
- peach blossom — the flower of the peach tree: the state flower of Delaware.
- pedestrianism — the exercise or practice of walking.
- penicilliform — in the shape of a pencil or paintbrush
- pentatonicism — the use of a five-tone scale.
- perfect storm — a detrimental or calamitous situation or event arising from the powerful combined effect of a unique set of circumstances: a perfect storm battering corporate pension plans.
- perfectionism — any of various doctrines holding that religious, moral, social, or political perfection is attainable.
- perichondrium — the membrane of fibrous connective tissue covering the surface of cartilages except at the joints.
- peripheralism — the explanation of psychological events emphasizing peripheral human functions, as those of skeletal muscles or the sex organs, rather than cognition or other processes of the central nervous system.
- perspectivism — the doctrine that reality is known only in terms of the perspectives of it seen by individuals or groups at particular moments.
- phalansterism — a model of society in which members of a community live in the same space and share common belongings
- phase diagram — a graph, usually using temperature, pressure, and composition as coordinates, indicating the regions of stability of the various phases of a system.
- phenomenalism — the doctrine that phenomena are the only objects of knowledge or the only form of reality.
- philhellenism — a friend or supporter of the Greeks.
- photochromism — the reversible transformation of something's colour due to exposure to electromagnetic radiation such as sunlight
- phototelegram — a telegram that is sent by means of phototelegraphy
- pick up steam — If a belief, a plan, or a project picks up steam, it starts to develop and become more important.
- pink bollworm — the larva of a gelechiid moth, Pectinophora gossypiella, that feeds on the seeds of the bolls of cotton and was introduced into cotton-growing regions of the world from Asia.
- plagiotropism — plagiotropic tendency or growth.
- plant kingdom — the plants of the world collectively.
- platiniridium — a natural alloy composed chiefly of platinum and iridium.
- plenum system — a type of air-conditioning system in which air is passed into a room at a pressure greater than atmospheric pressure
- plethysmogram — the recording of a plethysmograph.
- 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
- polydaemonism — the belief in many evil spirits.
- polynomialism — a polynomial naming system
- polysomnogram — a record of a person's sleep pattern, breathing, heart activity, and limb movements during sleep. Abbreviation: PSG.
- 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.
- 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.
- portal system — a vascular arrangement in which blood from the capillaries of one organ is transported to the capillaries of another organ by a connecting vein or veins.
- post meridiem — p.m.
- post-feminism — a way of thinking that develops, or reacts to or against previous feminist ideology
- postmodernism — (sometimes initial capital letter) any of a number of trends or movements in the arts and literature developing in the 1970s in reaction to or rejection of the dogma, principles, or practices of established modernism, especially a movement in architecture and the decorative arts running counter to the practice and influence of the International Style and encouraging the use of elements from historical vernacular styles and often playful illusion, decoration, and complexity.
- practice exam — an informal examination taken as a preparation for an actual or formal examination
- praetorianism — the control of a society by force or fraud, especially when exercised through titular officials and by a powerful minority.
- primal scream — a scream uttered by a person undergoing primal therapy.
- primary xylem — xylem derived directly from the growth of an apical meristem.
- progressivism — the principles and practices of progressives.
- proposal form — a form filled out by a person applying for insurance
- protectionism — Economics. the theory, practice, or system of fostering or developing domestic industries by protecting them from foreign competition through duties or quotas imposed on importations.
- protestantism — the religion of Protestants.
- protoactinium — protactinium.
- proverbialism — a proverbial expression
- provincialism — narrowness of mind, ignorance, or the like, considered as resulting from lack of exposure to cultural or intellectual activity.
- prudentialism — a regard for prudential, rather than moral, considerations
- pycnoconidium — a pycnidiospore
- radioactinium — the radioactive isotope of thorium having a mass number 227 and a half-life of 18.8 days. Symbol: RdAc, Th 227.
- radiotelegram — a message transmitted by radiotelegraphy.
- railroad worm — the larva of a fruit fly, Rhagoletis pomonella, that burrows through apples, forming tunnels that sometimes appear on the skin as faint depressions or darkened trails: a serious pest of apples in colder regions of North America.