15-letter words containing p, a, r, l
- apical meristem — meristem at the apex of a root or shoot.
- apolipoproteins — Plural form of apolipoprotein.
- apollo asteroid — one of a number of asteroids whose orbits cross that of the earth.
- apollo computer — (company) A company making workstations often used for CAD. From 1980 to 1987, Apollo were the largest manufacturer of network workstations. Apollo workstations ran Aegis, a proprietary operating system with a Posix-compliant Unix alternative frontend. Apollo's networking was particularly elegant, among the first to allow demand paging over the network, and allowing a degree of network transparency and low sysadmin-to-machine ratio that is still unmatched. Apollo's largest customers were Mentor Graphics (electronic design), GM, Ford, Chrysler, and Boeing (mechanical design). Apollo was acquired by Hewlett-Packard in 1989, and gradually closed down over the period 1990-1997.
- apostle pitcher — a stoneware pitcher decorated in relief with figures of the apostles.
- apostles' creed — a concise statement of Christian beliefs dating from about 500 ad, traditionally ascribed to the Apostles
- apostolic vicar — vicar apostolic.
- apostrophically — (rhetoric) Using apostrophe; with sudden exclamatory dialogue.
- appeal tribunal — An appeal tribunal is a special court or committee that is formed to reconsider a decision made by another court or committee.
- appellate court — In the United States, an appellate court is a special court where people who have been convicted of a crime can appeal against their conviction.
- appendicularian — of or relating to a family of molluscs (Appendicularia) characterized by their long tail appendages
- apple-pie order — perfect order or condition
- approach lights — lights on the runway that guide planes coming in to land
- approachability — capable of being approached; accessible.
- approval rating — approval of a politician as shown by opinion polls
- approved school — In Britain in the past, an approved school was a boarding school where young people could be sent to stay if they had been found guilty of a crime.
- archibald prize — an annual prize awarded by the Trustees of the Art Gallery of New South Wales since 1921, for outstanding contributions to art, letters, science, and politics
- armes parlantes — arms using devices to illustrate the name of the bearers, such as a rose and a wall to illustrate the name Rosewall
- arroz con pollo — a Latin American dish consisting of chicken and rice cooked usually with saffron
- artillery plant — any of various tropical urticaceous plants of the genus Pilea, such as P. microphylla, all having stamens that discharge their pollen explosively
- assemblypersons — Plural form of assemblyperson.
- astrophysically — from an astrophysical point of view
- 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.
- australian alps — a mountain range in SE Australia, in E Victoria and SE New South Wales. Highest peak: Mount Kosciuszko, 2195 m (7316 ft)
- australian pine — casuarina
- 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
- 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
- back plastering — the introduction of partitions of lath and plaster between the inner and outer surfaces of a stud wall in order to improve the insulating properties of the wall.
- ballpark figure — approximate number
- ballpeen hammer — a hammer that has one end of its head shaped in a hemisphere for beating metal, etc
- banana republic — Small, poor countries that are politically unstable are sometimes referred to as banana republics.
- bandpass filter — A bandpass filter is a filter designed to pass all frequencies within a band of frequencies.
- bandstop filter — A bandstop filter is a filter designed to eliminate all frequencies within a band of frequencies.
- barium sulphate — a white insoluble fine dense powder, used as a pigment, as a filler for paper, rubber, etc, and in barium meals. Formula: BaSO4
- battleship gray — a subdued bluish gray.
- beet leafhopper — a small leafhopper (Circulifer tenellus) that transmits a very destructive virus to sugar beets
- bias (ply) tire — a motor vehicle tire having a foundation of plies of rubberized cords in a crisscross pattern of lines diagonal to the center line of the tread
- biblia pauperum — any of the picture books illustrating Biblical events and usually containing a short text, used chiefly in the Middle Ages for purposes of religious instruction.
- 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.
- black operation — a covert and undocumented military operation
- black raspberry — a plant, Rubus occidentalis, of E North America, that has black berry-like fruits
- black september — a Palestinian Terrorist group, responsible for the assassinations of Israeli athletes at the Olympic Games at Munich in 1972
- 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.