15-letter words containing a, c, i, d, o
- pair production — Physics. the simultaneous creation of a particle and its antiparticle by a nucleus or particle in an excited state, as when a photon is absorbed.
- palindromically — a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
- partial product — the result obtained when a number is multiplied by one digit of a multiplier
- peak production — the maximum production
- pectoral girdle — (in vertebrates) a bony or cartilaginous arch supporting the forelimbs.
- pelargonic acid — a colorless, oily, water-immiscible liquid, C 9 H 1 8 O 2 , occurring as an ester in a volatile oil in species of pelargonium: used chiefly in organic synthesis and in the manufacture of lacquers and plastics.
- perchloric acid — a colorless, syrupy hygroscopic liquid, HClO 4 , an acid of chlorine containing one more oxygen atom than chloric acid: used chiefly as a reagent in analytical chemistry.
- phonocardiogram — the graphic record produced by a phonocardiograph.
- phosphoric acid — any of three acids, orthophosphoric acid, H 3 PO 4 , metaphosphoric acid, HPO 3 , or pyrophosphoric acid, H 4 P 2 O 7 , derived from phosphorus pentoxide, P 2 O 5 , and various amounts of water.
- photodissociate — to split or break up molecules as a result of the absorption of photons
- piano accordion — accordion (def 1).
- piano reduction — a musical score having the parts condensed or simplified in two staves, to render the music playable on the piano by one person.
- pick and choose — to choose or select from among a group: to pick a contestant from the audience.
- pick-and-shovel — marked by drudgery; laborious: the pick-and-shovel work necessary to get a political campaign underway.
- point d'alencon — Alençon lace (def 1).
- point-and-click — of or denoting an interface with which the user typically interacts by using a mouse to move the cursor and then clicking on a screen object.
- polychlorinated — having multiple chlorine atoms
- predicate logic — (logic) (Or "predicate calculus") An extension of propositional logic with separate symbols for predicates, subjects, and quantifiers. For example, where propositional logic might assign a single symbol P to the proposition "All men are mortal", predicate logic can define the predicate M(x) which asserts that the subject, x, is mortal and bind x with the universal quantifier ("For all"): All x . M(x) Higher-order predicate logic allows predicates to be the subjects of other predicates.
- premodification — an act or instance of modifying.
- primary product — a product consisting of a natural raw material; an unmanufactured product
- pseudo-academic — of or relating to a college, academy, school, or other educational institution, especially one for higher education: academic requirements.
- pseudo-artistic — conforming to the standards of art; satisfying aesthetic requirements: artistic productions.
- pseudo-chemical — of, used in, produced by, or concerned with chemistry or chemicals: a chemical formula; chemical agents.
- pseudo-critical — inclined to find fault or to judge with severity, often too readily.
- pseudo-dramatic — of or relating to the drama.
- pseudo-romantic — of, relating to, or of the nature of romance; characteristic or suggestive of the world of romance: a romantic adventure.
- pseudo-suicidal — pertaining to, involving, or suggesting suicide.
- psychodiagnosis — a psychological examination using psychodiagnostic techniques.
- pyrogallic acid — pyrogallol
- pyrogallic-acid — a white, crystalline, water-soluble, poisonous, solid, phenolic compound, C 6 H 3 (OH) 3 , obtained by heating gallic acid and water: used chiefly as a developer in photography, as a mordant for wool, in dyeing, and in medicine in the treatment of certain skin conditions.
- pyrometric bead — (in a kiln) a ball of material that indicates by changing color that a certain temperature has been reached.
- quadruplication — one of four copies or identical items, especially copies of typewritten material.
- rack-and-pinion — of or relating to a mechanism in which a rack engages a pinion: rack-and-pinion steering.
- radial velocity — the component of the motion of a star away from or toward the earth along its line of sight, expressed in miles or kilometers per second and determined by the shift in the wavelength of light emitted by the star.
- radio announcer — someone who broadcasts or presents radio programmes
- radio broadcast — sth transmitted via radio signal
- radio frequency — the frequency of the transmitting waves of a given radio message or broadcast.
- radio telescope — a system consisting of an antenna, either parabolic or dipolar, used to gather radio waves emitted by celestial sources and bring them to a receiver placed in the focus.
- radiochemically — by radiochemical means or methods; from a radiochemical perspective
- radiometrically — using a radiometric method, in terms of radiometry
- radiomicrometer — an instrument for measuring small amounts of radiant energy, consisting of a sensitive thermocouple connected to a galvanometer.
- radioprotection — protection against radiation
- radioprotective — giving protection against the effects of radiation
- radiotechnology — the technical application of any form of radiation to industry.
- radiotelemetric — of or relating to radiotelemetry
- re-adjudication — an act of adjudicating.
- reaccreditation — the act or process of reaccrediting something or someone
- recoil-operated — employing the recoil force of an explosive projectile to prepare the firing mechanism for the next shot.
- recombinant dna — DNA in which one or more segments or genes have been inserted, either naturally or by laboratory manipulation, from a different molecule or from another part of the same molecule, resulting in a new genetic combination.
- reconsideration — to consider again, especially with a view to change of decision or action: to reconsider a refusal.