12-letter words containing m, e, s, o, a
- nasal demons — Recognised shorthand on the Usenet group comp.std.c for any unexpected behaviour of a C compiler on encountering an undefined construct. During a discussion on that group in early 1992, a regular remarked "When the compiler encounters [a given undefined construct] it is legal for it to make demons fly out of your nose" (the implication is that the compiler may choose any arbitrarily bizarre way to interpret the code without violating the ANSI C standard). Someone else followed up with a reference to "nasal demons", which quickly became established.
- necromancers — Plural form of necromancer.
- nematologist — One who studies nematology.
- neofeudalism — A theorized contemporary rebirth of policies of governance, economy and public life reminiscent of those present in many feudal societies.
- neonomianism — the doctrine in Christian theology that the Gospel of Christ is a new Law, completely supplanting the Mosaic Law
- neoplatonism — a philosophical system, originated in the 3rd century a.d. by Plotinus, founded chiefly on Platonic doctrine and Eastern mysticism, with later influences from Christianity. It holds that all existence consists of emanations from the One with whom the soul may be reunited.
- neotribalism — Ideology that humans have evolved to live in a tribal, as opposed to a modern society.
- nestorianism — one of a sect of followers of Nestorius who denied the hypostatic union and were represented as maintaining the existence of two distinct persons in Christ.
- neurosarcoma — A malignant peripheral nerve sheath tumor, a form of cancer of the connective tissue surrounding nerves.
- newspaperdom — The realm or sphere of newspaper publishing or journalism.
- nitrosamines — Plural form of nitrosamine.
- noise margin — (electronics) The voltage difference between the guaranteed output level and the required input voltage level of a logic gate.
- noise-making — a person or thing that makes noise, as a reveler on New Year's Eve, Halloween, etc., or a rattle, horn, or similar device used on such an occasion.
- nomenclators — Plural form of nomenclator.
- nonsegmental — Not segmental.
- normalities' — conforming to the standard or the common type; usual; not abnormal; regular; natural.
- norman wells — a settlement in the W Northwest Territories, in NW Canada, on the Mackenzie River: oil wells.
- normed space — any vector space on which a norm is defined.
- nurserywoman — a woman who owns or operates a plant nursery.
- oamaru stone — a kind of limestone, of building quality, found at Oamaru on South Island, New Zealand
- oligospermia — (medicine) Low volume of semen.
- omnidistance — the distance between an omnirange station and a receiver.
- omnishambles — Chiefly British Informal. a situation, especially in politics, in which poor judgment results in disorder or chaos with potentially disastrous consequences.
- one-man show — a show with only one performer
- operationism — the doctrine that the meaning of a scientific term, concept, or proposition consists of the operation or operations performed in defining or demonstrating it.
- osteomalacia — a condition characterized by softening of the bones with resultant pain, weakness, and bone fragility, caused by inadequate deposition of calcium or vitamin D.
- osteomalacic — a condition characterized by softening of the bones with resultant pain, weakness, and bone fragility, caused by inadequate deposition of calcium or vitamin D.
- osteosarcoma — a malignant tumor of the bone.
- otitis media — inflammation of the middle ear, characterized by pain, dizziness, and impaired hearing.
- outmaneuvers — Third-person singular simple present indicative form of outmaneuver.
- ovariotomies — Plural form of ovariotomy.
- overemphasis — excessive or undue emphasis.
- overestimate — to estimate at too high a value, amount, rate, or the like: Don't overestimate the car's trade-in value.
- pachydermous — any of the thick-skinned, nonruminant ungulates, as the elephant, hippopotamus, and rhinoceros.
- paedobaptism — the baptism of infants
- periostracum — the external, chitinlike covering of the shell of certain mollusks that protects the limy portion from acids.
- peristomatic — surrounding a leaf's stoma or stomata
- photorealism — a style of painting flourishing in the 1970s, especially in the U.S., England, and France, and depicting commonplace scenes or ordinary people, with a meticulously detailed realism, flat images, and barely discernible brushwork that suggests and often is based on or incorporates an actual photograph.
- phrasemonger — phrasemaker (def 2).
- pleiochasium — a flowering system in which several buds come out at the same time
- plumulaceous — having the texture of down.
- pneumatocyst — the cavity of a pneumatophore.
- pole compass — (formerly) a ship's compass elevated on a wooden pole to isolate it as much as possible from local magnetism.
- policymakers — a person responsible for making policy, especially in government.
- postal meter — a postal franking machine
- postimperial — of, relating to, or designating the period after an empire
- postmedieval — occurring or existing after the Middle Ages, of or related to the period after the Middle Ages
- postmeridian — of or relating to the afternoon.
- power-stream — to stream and watch (multiple videos, episodes of a TV show, etc.) in one sitting or over a short period of time.
- praseodymium — a rare-earth, metallic, trivalent element, named from its green salts. Symbol: Pr; atomic weight: 140.91; atomic number: 59; specific gravity: 6.77 at 20°C.