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12-letter words containing p, r, o, n

  • petrogenesis — the branch of petrology dealing with the origin and formation of rocks.
  • petrogenetic — relating to petrogenesis
  • phanerogamic — any of the Phanerogamia, a former primary division of plants comprising those having reproductive organs; a flowering plant or seed plant (opposed to cryptogam).
  • phanerophyte — a tree or shrub that bears its perennating buds more than 25 cm above the level of the soil
  • pharyngology — the science of the pharynx and its diseases.
  • pharyngotomy — surgical incision into the pharynx
  • phenocrystic — relating to a phenocryst
  • phenyl group — the univalent group C 6 H 5 –, derived from benzene.
  • philanthropy — altruistic concern for human welfare and advancement, usually manifested by donations of money, property, or work to needy persons, by endowment of institutions of learning and hospitals, and by generosity to other socially useful purposes.
  • philharmonic — fond of or devoted to music; music-loving: used especially in the name of certain musical societies that sponsor symphony orchestras (Philharmonic Societies) and hence applied to their concerts (philharmonic concerts)
  • philodendron — a tropical American climbing plant belonging to the genus Philodendron, of the arum family, usually having smooth, shiny, evergreen leaves, often used as an ornamental houseplant.
  • phone number — of individual, business
  • phone phreak — a person who uses computers or other electronic devices to place long-distance telephone calls without paying toll charges.
  • phonographic — of, relating to, or characteristic of a phonograph.
  • photocurrent — an electric current produced by a photoelectric effect.
  • photoengrave — to make a photoengraving of.
  • photoneutron — a neutron emitted from a nucleus during photodisintegration.
  • photonuclear — of, relating to, or caused by the collision of high-energy photons with the nucleus of an atom.
  • phrasemonger — phrasemaker (def 2).
  • phrenologist — a psychological theory or analytical method based on the belief that certain mental faculties and character traits are indicated by the configurations of the skull.
  • phrenologize — to treat with phrenology or phrenological methods
  • phrontistery — a place or establishment for thinking, studying, or learning
  • phytohormone — hormone (def 3).
  • piano player — pianist.
  • picornavirus — any of a group of small, RNA-containing viruses of the family Picornaviridae, infectious to humans and other animals, and including the poliovirus and the rhinoviruses that cause the common cold.
  • picrocarmine — a red powder containing carmine and picric acid which is used in staining processes
  • picturephone — a type of telephone where users can see each other as they talk, through the transmission of video images
  • pig-ignorant — extremely ignorant or unknowledgeable
  • pigeon grape — a high-climbing vine, Vitis aestivalis, of the eastern U.S., having leaves that are dull above and rusty beneath, and bearing black, edible fruit.
  • pilot burner — pilot light (def 1).
  • pinch roller — a flexible device that presses magnetic tape against the capstan in a tape recorder.
  • pindaric ode — an ode consisting of several units, each of which is composed of a strophe and an antistrophe of identical form followed by a contrasting epode.
  • pinking iron — a tool for perforating, or for notching or scalloping the edge of fabric, leather, etc.
  • pinot grigio — a variety of grape, grown in Italy for wine-making
  • pinturicchio — real name Bernardino di Betto. ?1454–1513, Italian painter of the Umbrian school
  • pioneer work — pioneer work does something that has not been done before, for example by developing or using new methods or techniques
  • pipe routing — Pipe routing is the planning of pipeline layout, which includes considerations of neatness, economy, and safety.
  • piston skirt — The piston skirt is the cylindrical walls of a piston.
  • placentiform — shaped like a placenta, with a flat rounded form
  • planographic — the art or technique of printing from a flat surface directly or by offset.
  • player piano — a piano that can play automatically when the keys are actuated electronically or by a pneumatic device controlled by a piano roll.
  • pleurogenous — Anatomy. pertaining to or originating from the pleura.
  • pneumography — the process of recording the movements of the thorax in respiration.
  • pneumothorax — the presence of air or gas in the pleural cavity.
  • pneumotropic — directed toward or having an affinity for lung tissue.
  • poetastering — the profession of being a poetaster
  • pogonophoran — any member of the small phylum Pogonophora, slender tentacled animals having a tubelike outer covering, living on the deep ocean bottom.
  • pogson ratio — the brightness ratio of two celestial objects that differ by one magnitude. On the Pogson scale a difference of 5 magnitudes is defined as a difference of 100 in the intensities of two stars; therefore a difference of 1 magnitude is equal to the fifth root of 100, i.e. 2.512
  • point charge — an electric charge considered to exist at a single point, and thus having neither area nor volume.
  • point source — a source of radiation sufficiently distant compared to its length and width that it can be considered as a point.
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