12-letter words containing o, a, t, h
- photo layout — a picture spread. See under spread (def 33).
- photo spread — a picture spread. See under spread (def 33).
- photo-ageing — premature wrinkling of the skin caused by overexposure to sunlight
- photo-stated — a camera for making facsimile copies of documents, drawings, etc., in the form of paper negatives on which the positions of lines, objects, etc., in the originals are maintained.
- photoactinic — emitting radiation having the chemical effects of light and ultraviolet rays, as on a photographic film.
- photoanalyst — a person who analyzes and interprets photographs, especially a military specialist in aerial or satellite photography.
- photocathode — a cathode, typically of a cesium or sodium compound, having the property of emitting electrons when activated by light or other radiation.
- photodynamic — the science dealing with light and its effects on living organisms.
- photoelastic — displaying photoelasticity; of or relating to photoelasticity
- photoengrave — to make a photoengraving of.
- photogelatin — pertaining to any photographic process in which gelatin is used to receive or transfer a print.
- 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.
- photolyzable — able to undergo photolysis
- photomachine — a machine that prints copies of digital photographs
- photomontage — a combination of several photographs joined together for artistic effect or to show more of the subject than can be shown in a single photograph.
- photonuclear — of, relating to, or caused by the collision of high-energy photons with the nucleus of an atom.
- 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.
- photovoltaic — of or relating to the photovoltaic effect.
- 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.
- phycoxanthin — a yellow pigment found in brown seaweeds and types of algae
- physogastric — pertaining to the swollen, membranous abdomen of certain insects, especially termite and ant queens.
- phytoclimate — the climate of a small area, as of confined spaces such as caves or houses (cryptoclimate) of plant communities, wooded areas, etc. (phytoclimate) or of urban communities, which may be different from that in the general region.
- phytographer — a botanist involved with plant description
- phytonadione — vitamin K1.
- phytophagous — herbivorous.
- 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.
- phytotherapy — the use of plants and plant products for medicinal purposes
- pictographic — a pictorial sign or symbol.
- pigtail hook — a screw hook having an eye in the form of a spiral for holding a loop, chain link, etc., at any angle.
- plainclothes — Plainclothes police officers wear ordinary clothes instead of a police uniform.
- plasma torch — an electrical device for converting a gas into a plasma, used for melting metal
- play clothes — clothes that are suitable for playing in
- play through — to pass another foursome or group with their permission, while playing a round of golf
- plymouth bay — a small, well-protected bay on the coast of Massachusetts; the first permanent European settlement in New England; founded by the Pilgrim Fathers.
- pneumothorax — the presence of air or gas in the pleural cavity.
- point charge — an electric charge considered to exist at a single point, and thus having neither area nor volume.
- pointed arch — an arch having a pointed apex.
- polar lights — the aurora borealis in the Northern Hemisphere or the aurora australis in the Southern Hemisphere.
- polish wheat — a wheat, Triticum polonicum, grown chiefly in S Europe, N Africa, and Turkestan.
- poll watcher — a representative of a political party or of an organization running a candidate who is assigned to the polls on an election day to watch for violations of the laws that regulate voting, campaigning, etc.
- polychaetous — of or relating to the genus Polychaeta
- polycythemia — an abnormal increase in the number and concentration of circulating red blood corpuscles
- polygraphist — an instrument for receiving and recording simultaneously tracings of variations in certain body activities.
- polythiazide — a substance, C 1 1 H 1 3 ClF 3 N 3 O 4 S 3 , used as a diuretic in the management of edema and hypertension.
- polyurethane — a thermoplastic polymer containing the group NHCOO: used for padding and insulation in furniture, clothing, and packaging, and in the manufacture of resins for adhesives, elastomers, and fillers.
- post-harvest — Also, harvesting. the gathering of crops.