12-letter words containing r, o, t, h
- panchromatic — sensitive to all visible colors, as a photographic film.
- paragnathous — (of certain vertebrates) having the upper and lower jaws of equal length
- paranthelion — a bright spot in the sky caused by refraction and occurring at an angular distance from the sun of between 90° and 140°
- paranthropus — (sometimes initial capital letter) a member of the former genus Paranthropus.
- parathormone — a hormone secreted by the parathyroids, important in the control of the calcium-phosphorus balance of the body
- parochialist — a parochial character, spirit, or tendency; excessive narrowness of interests or view; provincialism.
- parting shot — a threat, insult, condemnation, sarcastic retort, or the like, uttered upon leaving.
- pass through — an act of passing.
- pass-through — a windowlike opening, as one for passing food or dishes between a kitchen and a dining area.
- pentahydroxy — (of a molecule) containing five hydroxyl groups.
- pericynthion — the point at which a spacecraft launched from earth into a lunar orbit is nearest the moon
- peritrichous — (of bacteria) having a uniform distribution of flagella over the body surface.
- peterborough — a city in Cambridgeshire, in central England.
- petrochemist — someone who studies petrochemistry or works in the petrochemical industry
- petroglyphic — relating to or having the characteristics of a petroglyph or carving made in rock
- petrophysics — the analysis of the constitution and characteristics of rocks
- phallocratic — relating to a male, or the beliefs assumed by such, who assumes authority over females due to his maleness
- phanerophyte — a tree or shrub that bears its perennating buds more than 25 cm above the level of the soil
- pharmacolite — hydrous calcium arsenate, 2CaO⋅As 2 O 5 ⋅5H 2 O, formed by natural alteration of mineral deposits containing arsenopyrite and arsenical ores of cobalt and silver.
- pharyngotomy — surgical incision into the pharynx
- phenocrystic — relating to a phenocryst
- 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.
- phosphaturia — the presence of an excessive quantity of phosphates in the urine.
- phosphoreted — phosphureted.
- phosphureted — combined with phosphorus, especially in its lowest valence state.
- photo relief — a method of showing the configuration of the relief of an area by photographing a model of it that is illuminated by a lamp in the northwest corner
- photo spread — a picture spread. See under spread (def 33).
- photochromic — (of chemically treated glass or plastic) capable of darkening or changing color when exposed to light.
- photocurrent — an electric current produced by a photoelectric effect.
- photoengrave — to make a photoengraving of.
- photographer — a person who takes photographs, especially one who practices photography professionally.
- photographic — of or relating to photography.
- photogravure — any of various processes, based on photography, by which an intaglio engraving is formed on a metal plate, from which ink reproductions are made.
- 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.
- photopolymer — a polymer or plastic that undergoes a change in physical or chemical properties when exposed to light.
- photoproduct — any product which is produced by a chemical reaction that uses light or other electromagnetic radiation to increase energy of particles
- 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.
- phototherapy — treatment of disease, especially of the skin, by means of light rays.
- photothermic — pertaining to the thermal effects of light.
- phototrophic — any organism that uses light as its principal source of energy.
- phototropism — phototropic tendency or growth.
- phragmoplast — the cytoplasmic structure that forms at the equator of the spindle after the chromosomes have divided during the anaphase of plant mitosis, and that initiates cell division.
- phreatophyte — a long-rooted plant that absorbs its water from the water table or the soil above it.
- 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.
- phrontistery — a place or establishment for thinking, studying, or learning
- physogastric — pertaining to the swollen, membranous abdomen of certain insects, especially termite and ant queens.
- phytographer — a botanist involved with plant description
- phytohormone — hormone (def 3).
- phytophthora — any of a group of fungi of the genus Phytophthora, which cause a serious plant disease, especially affecting apple and pear trees and potatoes.