15-letter words containing p, o, i, r
- absorption band — a dark band in the absorption spectrum of a substance, corresponding to a range of wavelengths for which the substance absorbs more strongly than at adjacent wavelengths.
- absorption edge — a discontinuity in the graph of the absorption coefficient of a substance plotted against the wavelength of x-rays being absorbed, representing the minimum energy necessary to free electrons from particular shells of the atoms of the substance.
- accordion pleat — one of a series of narrow, evenly spaced parallel pleats with alternating raised and recessed folds set into cloth or other material, usually by a commercial pleating machine.
- achromatophilia — the property of having little or no affinity for stains.
- actinopterygian — belonging or pertaining to the Actinopterygii, a group of bony fishes.
- action reporter — a news reporter who reports to the public on matters of special interest to the consumer.
- adjective group — An adjective group or adjectival group is a group of words based on an adjective, such as 'very nice' or 'interested in football'. An adjective group can also consist simply of an adjective.
- adoption papers — documentation relating to the adoption of a particular child
- aerial pingpong — Australian Rules football
- age-appropriate — Something that is age-appropriate is suitable for the age that a person is.
- air-superiority — designating a fighter aircraft built for long patrol capability at high altitudes and supersonic speeds, with air-to-air combat as its principal mission.
- airing cupboard — In British houses, an airing cupboard is a warm cupboard where you put clothes and other things that have been washed and partly dried, to make sure they are completely dry.
- aix-en-provence — a city and spa in SE France: the medieval capital of Provence. Pop: 145 721 (2006)
- alexandroupolis — a port in NE Greece, in W Thrace. Pop: 52 720 (2001 est)
- all-risk policy — An all-risk policy is an insurance policy that covers all loss or damage however it is caused, apart from any stated exceptions.
- allotetraploidy — the condition of being an allotetraploid
- allotriomorphic — (of minerals) not having their own regular shape (as determined by their internal structure) but being shaped instead by adjacent minerals
- alopecia areata — loss of hair in circumscribed patches.
- alpha geminorum — Castor
- alpha radiation — alpha particles emitted from a radioactive isotope
- alpine accentor — a small bird of the sparrow family, Prunella collaris, found especially in mountain regions of S Europe and Asia
- ambassadorships — Plural form of ambassadorship.
- american copper — a malleable, ductile, metallic element having a characteristic reddish-brown color: used in large quantities as an electrical conductor and in the manufacture of alloys, as brass and bronze. Symbol: Cu; atomic weight: 63.54; atomic number: 29; specific gravity: 8.92 at 20°C.
- amphiarthrodial — a joint permitting only slight motion, as that between the vertebrae.
- amyl propionate — a colorless liquid, C 8 H 16 O 2 , having an applelike odor, used chiefly as a scent in the manufacture of flavorings and perfume.
- anamorphic lens — a component in the optical system of a film projector for converting standard 35mm film images into wide-screen format
- anchorage point — a point to which something such as the straps securing a childseat can be safely attached
- andrographolide — (organic compound) A bitter labdane diterpenoid that is the main bioactive component of the medicinal plant Andrographis paniculata, effective against certain cancers.
- aneroid capsule — a box or chamber of thin metal, partially exhausted of air, used in the aneroid barometer and pressure altimeter.
- angina pectoris — a sudden intense pain in the chest, often accompanied by feelings of suffocation, caused by momentary lack of adequate blood supply to the heart muscle
- anisotropically — Physics. of unequal physical properties along different axes. Compare isotropic (def 1).
- annapolis royal — a town in SE Canada in W Nova Scotia on an arm of the Bay of Fundy: the first settlement in Canada (1605). Pop: 550 (2001)
- anteprohibition — before prohibition.
- anteroposterior — Relating to or directed toward both front and back.
- anthropobiology — the biological study of the human species
- anthropocentric — regarding man as the most important and central factor in the universe
- anthropogenesis — the study of the origins of man
- anthropological — the science that deals with the origins, physical and cultural development, biological characteristics, and social customs and beliefs of humankind.
- anthropologists — Plural form of anthropologist.
- anthropometrics — the science of measuring the size and proportions of the human body (called anthropometry), especially as applied to the design of furniture and machines.
- anthropomorphic — Anthropomorphic means relating to the idea that an animal, a god, or an object has feelings or characteristics like those of a human being.
- anthropopathism — ascription of human passions or feelings to a being or beings not human, especially to a deity.
- anthropophagite — a cannibal
- anthropopsychic — the attribution of consciousness to divine beings and nature
- anthroposophist — A proponent of anthroposophy.
- anti-censorship — the act or practice of censoring.
- anti-corruption — the act of corrupting or state of being corrupt.
- anti-productive — having the power of producing; generative; creative: a productive effort.
- antiaphrodisiac — something that represses sexual desire
- anticardiolipin — (medicine, immunology) Directed against cardiolipin.
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