16-letter words containing a, c, d, i
- nondiscretionary — subject or left to one's own discretion.
- nuclear industry — the industry involving nuclear weapons, nuclear power stations, etc
- nuclear medicine — diagnostic and therapeutic medical techniques using radionuclides or radioisotopes.
- objective danger — a danger, such as a stone fall or avalanche, to which climbing skill is irrelevant
- observation deck — an area on a high building that is surrounded with railings or fencing and which provides panoramic views
- octanedioic acid — a colourless crystalline dicarboxylic acid found in suberin and castor oil and used in the manufacture of synthetic resins. Formula: HOOC(CH2)6COOH
- of it own accord — If something happens of its own accord, it seems to happen by itself, without anyone making it happen.
- off-road vehicle — An off-road vehicle is a vehicle that is designed to travel over rough ground.
- oligosaccharides — Plural form of oligosaccharide.
- oneida community — a society of religious perfectionists established by John Humphrey Noyes, in 1848 at Oneida, N.Y., on the theory that sin can be eliminated through social reform: dissolved and reorganized in 1881 as a joint-stock company.
- orographic cloud — any cloud whose existence and form are largely controlled by the disturbed flow of air over and around mountains, as the banner cloud and crest cloud.
- orthoformic acid — a hypothetical acid, HC(OH) 3 , known only in the form of its esters.
- overdramatically — In an overdramatic manner.
- oxaloacetic acid — a crystalline organic acid, C 4 H 4 O 5 , that is an important intermediate in the Krebs cycle, where it is formed by the oxidation of malic acid and is acetylated to form citric acid: also a product of transamination reactions of aspartic acid.
- paediatric nurse — a nurse who specializes in the care of children
- palmitoleic acid — a colorless, unsaturated fatty acid, C 1 6 H 3 0 O 2 , occurring in oils and fats of plants and animals.
- panel discussion — a formal discussion before an audience for which the topic, speakers, etc., have been selected in advance.
- pantothenic acid — a hydroxy acid, C 9 H 1 7 O 5 N, found in plant and animal tissues, rice, bran, etc., that is part of the B complex of vitamins and is essential for cell growth.
- paradigmatically — of or relating to a paradigm.
- pelagic division — the biogeographic realm or zone that comprises the open seas and oceans, including water of all depths.
- pencil and paper — An archaic information storage and transmission device that works by depositing smears of graphite on bleached wood pulp. More recent developments in paper-based technology include improved "write-once" update devices which use tiny rolling heads similar to mouse balls to deposit coloured pigment. All these devices require an operator skilled at so-called "handwriting" technique. These technologies are ubiquitous outside hackerdom, but nearly forgotten inside it. Most hackers had terrible handwriting to begin with, and years of keyboarding tend to have encouraged it to degrade further. Perhaps for this reason, hackers deprecate pencil-and-paper technology and often resist using it in any but the most trivial contexts.
- periodic decimal — repeating decimal.
- periodic tenancy — the letting of a dwelling for a repeated short term, as by the week, month, or quarter, with no end date
- permanganic acid — an acid, HMnO 4 , known only in solution.
- perpendicularity — vertical; straight up and down; upright.
- persulfuric acid — Also called Caro's acid, permonosulfuric acid, peroxymonosulfuric acid, peroxysulfuric acid. a white, crystalline solid, H 2 SO 5 , used as an oxidizing agent for certain organic compounds.
- phagocytic index — the average number of bacteria ingested per phagocyte in an incubated mixture of bacteria, phagocytes, and blood serum: used in determining the opsonic index.
- pharmacodynamics — the branch of pharmacology dealing with the course of action, effect, and breakdown of drugs within the body.
- phase difference — the difference between two sinusoidally varying quantities that have the same frequency, measured either as an angle or a time
- phonocardiograph — an instrument for graphically recording the sound of the heartbeat.
- phosphorous acid — a colorless, crystalline, water-soluble acid of phosphorus, H 3 PO 3 , from which phosphites are derived.
- physical address — (memory management) The address presented to a computer's main memory in a virtual memory system, in contrast to the virtual address which is the address generated by the CPU. A memory management unit translates virtual addresses into physical addresses.
- pico de sao tome — an island in the Gulf of Guinea, off the W coast of Gabon, just N of the equator: the larger component of the Democratic Republic of São Tomé and Príncipe. 318 sq. mi. (824 sq. km).
- picture postcard — postcard (def 1).
- piece d'occasion — something prepared or used for a special occasion.
- pierce's disease — a disease of grapes caused by a rickettsialike organism, characterized by dwarfing of vines, mottling of woody tissues, and plant death.
- pinot chardonnay — Chardonnay.
- pithecanthropoid — of, relating to, or resembling the former genus Pithecanthropus or one of its members.
- pocket billiards — pool2 (def 1).
- poisoned chalice — If you refer to a job or an opportunity as a poisoned chalice, you mean that it seems to be very attractive but you believe it will lead to failure.
- polar coordinate — Usually, polar coordinates. one of two coordinates used to locate a point in a plane by the length of its radius vector and the angle this vector makes with the polar axis (polar angle)
- polyacrylic acid — a polymer of acrylic acid used as a sizing agent in the manufacture of nylon and other synthetic textiles.
- polycondensation — formation of a polymer by chemical condensation with the elimination of a small molecule, such as water.
- posigrade rocket — an auxiliary rocket used to separate the sections of a multistage rocket, fired in the direction of flight.
- prescription pad — a pad of prescriptions used by doctors, etc
- price leadership — the setting of the price of a product or service by a dominant firm at a level that competitors can match, in order to avoid a price war
- primary deviance — the violation of a norm or rule that does not result in the violator's being stigmatized as deviant.
- primary producer — any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter.
- program director — a chief executive responsible for selecting and scheduling programs.
- project guardian — (project, security) A project which grew out of the ARPA support for Multics and the sale of Multics systems to the US Air Force. The USAF wanted a system that could be used to handle more than one security classification of data at a time. They contracted with Honeywell and MITRE Corporation to figure out how to do this. Project Guardian led to the creation of the Access Isolation Mechanism, the forerunner of the B2 labeling and star property support in Multics. The DoD Orange Book was influenced by the experience in building secure systems gained in Project Guardian.