12-letter words containing a, r, m, o
- propagandism — the art, system, or use of propaganda
- proper psalm — a psalm used only on a particular day or feast
- property man — a member of the stage crew in charge of the stage properties
- protactinium — a radioactive, metallic element. Symbol: Pa; atomic number: 91.
- prothalamion — a song or poem written to celebrate a marriage.
- prothalamium — prothalamion.
- protoplasmic — Biology. (no longer in technical use) the colloidal and liquid substance of which cells are formed, excluding horny, chitinous, and other structural material; the cytoplasm and nucleus.
- provitamin a — carotene.
- pseudamphora — a Mycenaean vase having a spherical body, a spout on the shoulder, and a handle, curving across the top, supported by a solid conical neck.
- pseudomartyr — someone falsely or inaccurately called a martyr
- pseudorandom — noting or pertaining to random numbers generated by a definite computational process to satisfy a statistical test.
- pteridomania — an excessive enthusiasm for ferns
- pyramidology — a belief system based on the supposed occult significance of the Egyptian pyramids
- pyridoxamine — a metabolic form of pyridoxine
- pyrochemical — pertaining to or producing chemical change at high temperatures.
- pyromagnetic — (formerly) thermomagnetic (def 1).
- pyromaniacal — a compulsion to set things on fire.
- quadrinomial — consisting of four terms.
- quadrominium — a building consisting of four individually owned apartments or living units.
- quadrumanous — four-handed; having all four feet adapted for use as hands, as monkeys.
- quasi-normal — conforming to the standard or the common type; usual; not abnormal; regular; natural.
- quiz program — a radio or television program in which contestants compete, often for prizes, by answering questions.
- race norming — the process of statistically adjusting the scores of minority job applicants on job-qualification tests by rating each test-taker's score against the results of others in his or her racial or ethnic group.
- racemization — the conversion of an optically active substance into an optically inactive mixture of equal amounts of the dextrorotatory and levorotatory forms.
- rachiotomies — Plural form of rachiotomy.
- rachmaninoff — Sergei Wassilievitch [sur-gey vuh-seel-yuh-vich;; Russian syir-gyey vuh-syee-lyi-vyich] /sɜrˈgeɪ vəˈsil yə vɪtʃ;; Russian syɪrˈgyeɪ vʌˈsyi lyɪ vyɪtʃ/ (Show IPA), 1873–1943, Russian pianist and composer.
- racing homer — a kind of homing pigeon used for racing
- radioelement — a radioactive element.
- radiomimetic — (of drugs) producing effects similar to those produced by X-rays
- radiothorium — a disintegration product of thorium.
- ragman rolls — Usually, ragman rolls. a series of documents in which the Scottish nobles acknowledged their allegiance to Edward I of England, 1291–92 and 1296.
- ram sth home — If something rams home a message or a point, it makes it clear in a way that is very forceful and that people are likely to listen to.
- rambunctious — difficult to control or handle; wildly boisterous: a rambunctious child.
- ramentaceous — resembling or covered with ramenta.
- ramification — the act or process of ramifying.
- rammohun roy — Rammohun [rah-moh-hon] /rɑˈmoʊ hɒn/ (Show IPA), 1774–1833, Indian religious leader: founder of Brahmo Samaj.
- random error — an error that has a random distribution and can be attributed to chance.
- rattail comb — a comb for the hair having a narrow, pointed handle used in styling the hair.
- re-admission — the act of allowing to enter; entrance granted by permission, by provision or existence of pecuniary means, or by the removal of obstacles: the admission of aliens into a country.
- re-animation — to restore to life; resuscitate.
- reading room — a room set aside for reading, as in a library or club.
- rear-mounted — (of an engine, etc) fitted at the back of a vehicle
- reassortment — the act of assorting; distribution; classification.
- reassumption — the act or process of reassuming something
- recompensate — to recompense for something: They gave him ten dollars to compensate him for his trouble.
- reestimation — judgment or opinion: In my estimation the boy is guilty.
- reflectogram — an image of an under-drawing or image taken from beneath the surface of paint in a work of art
- reform flask — an English salt-glazed stoneware flask of the early 19th century formed as an effigy of one of the figures connected with the Reform Bill of 1832.
- reformatting — the shape and size of a book as determined by the number of times the original sheet has been folded to form the leaves. Compare duodecimo, folio (def 2), octavo, quarto.
- remonstrance — an act or instance of remonstrating.