18-letter words containing p, i, a, g
- occupational group — An occupational group is a category used by insurance companies to classify jobs according to how hazardous they are.
- off-street parking — spaces for cars located on private property rather than on a public street
- offset lithography — offset (def 6).
- operating expenses — Operating expenses are expenses related to carrying out normal business activities.
- operating software — software used in the operation of a computer system, typically by performing such tasks as memory allocation, job scheduling, and input/output control
- operations manager — business director
- ophthalmologically — In an ophthalmological manner.
- optical brightener — an additive that dyes and brightens fabric or paper
- oscillographically — By means of oscillography.
- ox-tongue partisan — a shafted weapon having a long, wide, tapering blade.
- paediatric nursing — the branch of nursing concerned with the care of children
- paleoclimatologist — the branch of paleogeography dealing with the study of paleoclimates.
- palmer archipelago — a group of islands in the South Atlantic Ocean, off the NW coast of the Antarctic Peninsula.
- pan-indian dancing — fancy dance (def 1).
- parachute regiment — an airborne regiment of an army
- paraglyph printing — the printing of the positive and negative of a radiograph superimposed in slight misalignment to give the effect of a relief.
- parallel computing — parallel processing
- parallel importing — the importing of certain goods, esp pharmaceutical drugs, by dealers who undersell local manufacturers
- parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
- partial-vegetarian — a person who eats mostly plant foods, dairy products, and eggs, and occasionally chicken, fish, and red meat.
- particular average — a loss at sea, as through accident or negligence, that is borne solely by the owner of the lost property. Abbreviation: P.A.
- passing modulation — a modulation of a temporary nature.
- passing-out parade — a ceremonial parade of cadets who have completed their training
- passive-aggressive — denoting or pertaining to a personality type or behavior marked by the expression of negative emotions in passive, indirect ways, as through manipulation or noncooperation: a passive-aggressive employee who often misses deadlines.
- pathologic anatomy — the branch of pathology dealing with the morphologic changes in tissues.
- pattern bargaining — a collective bargaining technique in which contract terms in one settlement are used as models to be imposed on other negotiating parties within an industry.
- peacekeeping force — a force designated to the maintenance of peace, esp the prevention of further fighting between hostile forces in an area
- pedal steel guitar — an oblong, floor-mounted electrified guitar, usually having ten strings, fretted with a steel bar and producing a wailing sound that is modulated by use of a foot pedal.
- pemphigus vulgaris — a potentially fatal blistering skin disease, characterized by large blisters on the skin, mucous membranes of the mouth, genitals, intestines, etc, which eventually rupture and form painful denuded areas from which critical amounts of bodily protein, fluid, and blood may be lost
- people trafficking — the practice of bringing immigrants into a country illegally
- percentile ranking — the percentage of scores that a particular score is greater than
- perceptual mapping — the use of a graph or map in the development of a new product, in which the proximity of consumers' images of the new product to those of an ideal product provide an indication of the new product's likely success
- percussion flaking — a method of forming a flint tool by striking flakes from a stone core with another stone or a piece of bone or wood.
- perennial ryegrass — any of several European grasses of the genus Lolium, as L. perenne (perennial ryegrass) grown for forage in the U.S.
- personal organizer — a small notebook with sections for personal information, as dates and addresses.
- phantasmagorically — having a fantastic or deceptive appearance, as something in a dream or created by the imagination.
- phase-shift keying — (communications) (PSK) A digital modulation scheme that conveys data by changing the phase of a carrier wave. The data can either determine the absolute phase relative to the unmodulated carrier or reference signal ("coherent phase-shift keying", CPSK) or the change in phase ("differential phase-shift keying", DPSK). The number of different phases used determines the amount of data that can be transmitted in each cycle. Each cycle can be considered to constitute one "symbol", e.g. with two possible phases, each cycle carries one bit. The more phases that are used, the less tollerant to noise the transmissions becomes. Alternatives to PSK are amplitude-shift keying (ASK) and frequency-shift keying (FSK).
- photochemical smog — air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust.
- physical geography — the branch of geography concerned with natural features and phenomena of the earth's surface, as landforms, drainage features, climates, soils, and vegetation.
- phytohemagglutinin — a lectin, obtained from the red kidney bean, that binds to the membranes of T cells and stimulates metabolic activity, cell division, etc.
- pig-tailed macaque — a forest-dwelling southeast Asian macaque, Macaca nemestrina, having a short, curled tail, colonized for animal behavior studies.
- pigmy hippopotamus — a related but smaller animal, Choeropsis liberiensis
- plains grasshopper — a large, destructive short-horned grasshopper, Brachystola magna, of the western U.S., marked by pinkish hind wings.
- plane trigonometry — the branch of trigonometry dealing with plane triangles.
- plate-glass window — a window that has glass which has been formed by rolling
- play silly buggers — to fool around and waste time
- plenary indulgence — a remission of the total temporal punishment that is still due to sin after absolution. Compare indulgence (def 6).
- point d'angleterre — a bobbin lace in which the design is worked out with either a needle or bobbin.
- point-bearing pile — a pile depending on the soil or rock beneath its foot for support.
- pontifical college — the chief body of priests in ancient Rome.