13-letter words containing p, h, o, r
- peppered moth — a European geometrid moth, Biston betularia, occurring in a pale grey speckled form in rural areas and a black form in industrial regions
- perchlorinate — to combine with the maximum proportion of chlorine.
- perichondrium — the membrane of fibrous connective tissue covering the surface of cartilages except at the joints.
- petrochemical — a chemical substance obtained from petroleum or natural gas, as gasoline, kerosene, or petrolatum.
- petrophysical — relating to the analysis of the constitution and characteristics of rocks
- phallocentric — a doctrine or belief centered on the phallus, especially a belief in the superiority of the male sex.
- phantasmagory — phantasmagoria.
- pharaoh hound — one of a breed of medium-sized gazehounds with a smooth coat, red to tan in color with white markings, and erect ears.
- pharmacognosy — materia medica (def 2).
- pharmacologic — the science dealing with the preparation, uses, and especially the effects of drugs.
- pharmacopoeia — a book published usually under the jurisdiction of the government and containing a list of drugs, their formulas, methods for making medicinal preparations, requirements and tests for their strength and purity, and other related information.
- pharyngectomy — excision of part or all of the pharynx.
- pharyngoscope — an instrument for inspecting the pharynx.
- pharyngoscopy — an examination by means of a pharyngoscope.
- phenobarbital — a white, crystalline powder, C 1 2 H 1 2 N 2 O 3 , used as a sedative, a hypnotic, and as an antispasmodic in epilepsy.
- phenoxy resin — any of a class of resins derived from polyhydroxy ethers
- philanthropic — of, pertaining to, engaged in, or characterized by philanthropy; benevolent: a philanthropic foundation.
- philosophizer — to speculate or theorize, usually in a superficial or imprecise manner.
- phlebographic — relating to phlebography or the X-ray imaging of a vein that has been injected with a dye that is visible on the image taken
- phonautograph — a piece of equipment that records sound visually by detecting the sound waves and indicating them on a graph
- phonoreceptor — a receptor stimulated by sound waves.
- phosphoretted — combined with phosphorus, especially in its lowest valence state.
- phosphorus 32 — a radioactive isotope of phosphorus, used as a chemotherapeutic agent.
- phosphorus-32 — a radioactive isotope of phosphorus, used as a chemotherapeutic agent.
- phosphorylase — any enzyme, occurring widely in animal and plant tissue, that in the presence of an inorganic phosphate catalyzes the conversion of glycogen into sugar phosphate.
- phosphorylate — to introduce the phosphoryl group into (an organic compound).
- phosphuretted — treated or combined with phosphorus
- photo gallery — display of collected photographs
- photo-sharing — the publishing of digital photographs on the internet
- photoallergic — photosensitive.
- photochromism — the reversible transformation of something's colour due to exposure to electromagnetic radiation such as sunlight
- photocomposer — a machine for setting type photographically.
- photodetector — photosensor.
- photoelectric — pertaining to the electronic or other electric effects produced by light.
- photoelectron — an electron emitted from a system by the photoelectric effect.
- photofinisher — a person whose profession is photofinishing
- photographing — a picture produced by photography.
- photophoresis — the move away from a strong light source by previously suspended particles in a gas
- photoreaction — a chemical reaction that involves or requires light.
- photoreceptor — a receptor stimulated by light.
- photorecorder — a device for making photographic records.
- phototelegram — a telegram that is sent by means of phototelegraphy
- phraseologist — a person who treats of or is concerned with phraseology.
- phreatophytic — of, possessing the properties of, or relating to a phreatophyte
- phrygian mode — an authentic church mode represented on the white keys of a keyboard instrument by an ascending scale from E to E.
- phycoerythrin — a red protein pigment occurring in red algae.
- physharmonica — a keyboard musical instrument fitted with free reeds, and which is an early form of harmonium
- physiographic — the science of physical geography.
- physiotherapy — physical therapy.
- phytoestrogen — an estrogen-like compound occurring naturally in plants of the legume family and in grains, vegetables, and fruits.