15-letter words containing a, p, o, i
- approximateness — The quality of being approximate.
- arc de triomphe — the triumphal arch in Paris begun by Napoleon I to commemorate his victories of 1805–6 and completed in 1836
- arch of triumph — Arc de Triomphe.
- archiepiscopacy — a form of church government in which power is vested in archbishops.
- archiepiscopate — the rank, office, or term of office of an archbishop
- armour-piercing — capable of penetrating armour plate
- arms inspection — the official checking of a country's weapons and other military equipment, usually to check that international agreements have been respected
- asclepiadaceous — of, relating to, or belonging to the Asclepiadaceae, a family of mostly tropical and subtropical flowering plants, including the milkweed and swallowwort, having pollen in the form of a waxy mass (pollinium): now usually regarded as a subfamily of the Apocynaceae
- assign a policy — If you assign a policy, you transfer legal ownership of an insurance policy to another person.
- astrophysically — from an astrophysical point of view
- astrophysicists — Plural form of astrophysicist.
- at pistol point — being under or using the threat of being shot
- at the point of — very close to; on the verge of
- athletic sports — sports, esp track and field events, in which athleticism is required
- atmospherically — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- audio equipment — electrical devices used to play or record sound
- 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.
- automatic pilot — An automatic pilot or an autopilot is a device in an aircraft that automatically keeps it on a particular course.
- automorphically — in an automorphic manner
- autoradiographs — Plural form of autoradiograph.
- autoradiography — the technique or process of making autoradiographs.
- autotetraploidy — the generation of the tetraploid state, created by the fusing of two nuclei from the same species
- 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.
- bacteriophagous — Pertaining to the predation and consumption of bacterium.
- balanoposthitis — An inflammation of the glans penis and the prepuce.
- ballpoint (pen) — a pen having, instead of a point, a small ball bearing that picks up its ink by rolling against an interior ink reservoir
- 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
- bear comparison — to be sufficiently similar in class or range to be compared with (something else), esp favourably
- 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.
- bishop auckland — a town in N England, in central Durham: seat of the bishops of Durham since the 12th century: light industries. Pop: 24 764 (2001)
- bit-mapped font — a computer font whose characters are held in memory as series of dots.
- 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.
- boiled potatoes — potatoes, usually peeled, cooked in boiling water
- bouillotte lamp — a table lamp of the 18th century, having two or three adjustable candle brackets and a common shade sliding on a central shaft.
- bowel complaint — bowel disease or condition
- brachiocephalic — of, relating to, or supplying the arm and head