13-letter words containing a, p, e, l
- one-punch law — a law prescribing punitive sentences for assault, including assault comprising a single blow
- onomatopoeial — (obsolete, rare) Of or pertaining to onomatopoeia.
- open a bottle — If you open a bottle, you remove the cork or cap.
- open interval — (mathematics) A type of interval (range of numbers) that does not include either of its endpoints. For example, when mixing red and blue paint, the proportion of red lies in the interval 0% to 100% but can't be exactly 0% or 100% or it wouldn't be a mixture.
- open learning — a system of further education on a flexible part-time basis
- openheartedly — Alt form open-heartedly.
- opera glasses — small binoculars
- operationally — able to function or be used; functional: How soon will the new factory be operational?
- opinionatedly — In an opinionated manner.
- opthalmoscope — Misspelling of ophthalmoscope.
- optical bench — an apparatus, as a special table or rigid beam, for the precise positioning of light sources, screens, and optical instruments used for optical and photometric studies, having a ruled bar to which these devices can be attached and along which they can be readily adjusted.
- optical drive — optical disk drive
- optical fiber — optical fibre
- optical fibre — (communications) (fibre optics, FO, US "fiber", light pipe) A plastic or glass (silicon dioxide) fibre no thicker than a human hair used to transmit information using infra-red or even visible light as the carrier (usually a laser). The light beam is an electromagnetic signal with a frequency in the range of 10^14 to 10^15 Hertz. Optical fibre is less susceptible to external noise than other transmission media, and is cheaper to make than copper wire, but it is much more difficult to connect. Optical fibres are difficult to tamper with (to monitor or inject data in the middle of a connection), making them appropriate for secure communications. The light beams do not escape from the medium because the material used provides total internal reflection. See also FDDI, Optical Carrier n, SONET.
- optical mouse — (hardware) Any kind of mouse that uses visible light or infrared to detect changes in its position.
- optical wedge — a wedge-shaped filter whose transmittance decreases from one end to the other: used as an exposure control device in sensitometry.
- oropharyngeal — the part of the pharynx between the soft palate and the upper edge of the epiglottis.
- orthocephalic — having a medium or intermediate relation between the height of the skull and the breadth or length.
- orthoepically — In terms of correct pronunciation.
- orthopaedical — Pertaining to orthopaedics; characteristic of orthopaedia.
- osteoplasties — Plural form of osteoplasty.
- outmanipulate — to surpass in manipulation
- over-planning — a scheme or method of acting, doing, proceeding, making, etc., developed in advance: battle plans.
- over-populate — to fill with an excessive number of people, straining available resources and facilities: Expanding industry has overpopulated the western suburbs.
- overamplified — amplified too much, causing distortion or discomfort, etc
- overappraisal — An appraisal that overvalues something.
- overland park — a town in E Kansas, near Kansas City.
- overpedalling — the overuse of the piano's pedals
- overpopulated — to fill with an excessive number of people, straining available resources and facilities: Expanding industry has overpopulated the western suburbs.
- overpotential — overvoltage.
- overspeculate — to engage in thought or reflection; meditate (often followed by on, upon, or a clause).
- pacific plate — Geology. one of the major tectonic divisions of the earth's crust, comprising four sea-floor basins; separated from the Nazca, Cocos, and North and South American plates by the East Pacific Rise and San Andreas fault and bounded in the western Pacific Ocean by a series of major ocean deeps, including the Kuril, Japan, Mariana, Kermadec, and Tonga trenches.
- pact of steel — a military alliance concluded between Nazi Germany and Fascist Italy on May 22, 1939, committing each to assist the other in the event of war with another power and pledging that neither would seek a separate peace or armistice.
- paddle tennis — a game combining elements of tennis and handball, played with paddles and a rubber ball on a screened court about half the size of and having a lower net than a tennis court.
- painterliness — the quality of being painterly
- paisley shawl — a shawl made from paisley fabric
- palaeobiology — the study of fossil plants and animals
- palaeoclimate — the climate of a prehistoric age
- palaeocrystic — consisting of former glacial formation
- palaeocurrent — an ancient current, esp of water, evidence of which has been preserved in sedimentary rocks as fossilized ripple marks, etc
- palaeoecology — the study of fossil animals and plants in order to deduce their ecology and the environmental conditions in which they lived
- palaeontology — Palaeontology is the study of fossils as a guide to the history of life on Earth.
- palaeozoology — the study of fossil animals
- paleethnology — (formerly) the branch of ethnology concerned with the earliest or most primitive human societies.
- paleo-asiatic — a member of any of various Mongoloid peoples of northeastern Asia.
- paleomagnetic — Geology. magnetic polarization acquired by the minerals in a rock at the time the rock was deposited or solidified.
- paleopedology — the branch of pedology dealing with the soils of past geologic ages.
- paleosiberian — a group of languages comprising those languages of Siberia that are not affiliated with Indo-European, Altaic, Uralic, or Eskimo-Aleut and including the Chukotian family and the unrelated language isolates Ket, Nivkh, and Yukaghir; Paleo-Asiatic.
- paleotropical — belonging or pertaining to a geographical division comprising the Ethiopian and Oriental regions.
- palette knife — a thin blade of varying flexibility set in a handle and used for mixing colors or applying them to a canvas.