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15-letter words containing p, r, o

  • autobiographers — Plural form of autobiographer.
  • autobiographies — Plural form of autobiography.
  • autolithography — a lithographic technique by which the artist draws or traces with a brush and pen directly on a stone or plate.
  • automorphically — in an automorphic manner
  • autoradiographs — Plural form of autoradiograph.
  • autoradiography — the technique or process of making autoradiographs.
  • autostereoscopy — The display of stereoscopic images without the use of special viewing equipment.
  • autotetraploidy — the generation of the tetraploid state, created by the fusing of two nuclei from the same species
  • autotransplants — Plural form of autotransplant.
  • autotrophically — through an autotrophic process
  • away-going crop — a crop planted by a tenant that matures after the expiration of the tenancy and is rightfully the tenant's to harvest.
  • back projection — a method of projecting pictures onto a translucent screen so that they are viewed from the opposite side, used esp in films to create the illusion that the actors in the foreground are moving
  • backup rotation — (operating system)   Any system for re-using backup media, e.g. magnetic tape. One extreme would be to use the same media for every backup (e.g. copy disk A to disk B), the other extreme would be to use new media every time. The trade-off is between the cost of buying and storing media and the ability to restore any version of any file. One example is the Grandfather, Father, Son (GFS) scheme.
  • backup software — (tool, software)   Software for doing a backup, often included as part of the operating system. Backup software should provide ways to specify what files get backed up and to where. It may include its own scheduling function to automate the procedure or, preferably, work with generic scheduling facilities. It may include facilities for managing the backup media (e.g. maintaining an index of tapes) and for restoring files from backups. Examples are Unix's dump command and Windows's ntbackup.
  • bacteriophagous — Pertaining to the predation and consumption of bacterium.
  • bad housekeeper — a person who is not an efficient and thrifty domestic manager
  • bandstop filter — A bandstop filter is a filter designed to eliminate all frequencies within a band of frequencies.
  • banking product — one of the various services offered by a bank to its customers: mortgages, loans, insurance etc
  • baptism of fire — If someone who has just begun a new job has a baptism of fire, they immediately have to cope with very many severe difficulties and obstacles.
  • barium peroxide — a gray-white powder, BaO2, used as a bleach and in making hydrogen peroxide
  • barothermograph — an automatic instrument for recording pressure and temperature.
  • be spoiling for — to have an aggressive desire for (a fight, etc)
  • beam-power tube — a vacuum tube in which the stream of electrons flowing to the plate is focused by the action of a set of auxiliary, charged elements, giving an increase in output power.
  • bear comparison — to be sufficiently similar in class or range to be compared with (something else), esp favourably
  • bedroom slipper — a soft shoe worn in the house
  • beet leafhopper — a small leafhopper (Circulifer tenellus) that transmits a very destructive virus to sugar beets
  • beetroot purple — a deep purple-red; a purple pigment derived from beets.
  • ben day process — a method of adding texture, shading, or detail to line drawings by overlaying a transparent sheet of dots or any other pattern during platemaking
  • bergius process — a method of hydrogenation formerly used with coal to produce an oil similar to petroleum.
  • bibliographical — a complete or selective list of works compiled upon some common principle, as authorship, subject, place of publication, or printer.
  • billiard parlor — poolroom (def 1).
  • biobibliography — a bibliography containing biographical sketches of the authors listed.
  • biostratigraphy — the examination of the ages of rock strata by using fossils
  • bird of passage — If you refer to someone as a bird of passage, you mean that they are staying in a place for a short time before going to another place.
  • bits per second — (communications, unit)   (bps, b/s) The unit in which data rate is measured. For example, a modem's data rate is usually measured in kilobits per second. In 1996, the maximum modem speed for use on the PSTN was 33.6 kbps, rising to 56 kbps in 1997. Note that kilo- (k), mega- (M), etc. in data rates denote powers of 1000, not 1024.
  • black operation — a covert and undocumented military operation
  • bladder campion — a European caryophyllaceous plant, Silene vulgaris, having white flowers with an inflated calyx
  • blasting powder — a form of gunpowder made with sodium nitrate instead of saltpeter, used chiefly for blasting rock, ore, etc.
  • blood corpuscle — one of the cells in the blood
  • blotch printing — a fabric-printing method in which the ground color is transferred from the cylinder and the motif retains the original hue of the cloth.
  • board of parole — an agency that determines which prisoners are to be released on parole
  • boustrophedonic — of or relating to lines written in opposite directions
  • brachiocephalic — of, relating to, or supplying the arm and head
  • branchial pouch — one of a series of rudimentary outcroppings of the inner pharyngeal wall, corresponding to the branchial grooves on the surface.
  • break-in period — a period during which certain restrictions or moderation in operating should be followed, as the avoidance of high speed, rapid acceleration, or severe braking for a new automobile.
  • break-out group — a group of people who detach themselves from a larger group or meeting in order to hold separate discussions
  • breakeven point — a point at which the total revenue and total cost are equal
  • breaking plough — a plough with a long shallow mouldboard for turning virgin land or sod land
  • broca's aphasia — a type of aphasia caused by a lesion in Broca's area of the brain, characterized by misarticulated speech and lack of grammatical morphemes.
  • brocken specter — an optical phenomenon sometimes occurring at high altitudes when the image of an observer placed between the sun and a cloud is projected on the cloud as a greatly magnified shadow.
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