15-letter words containing r, i, d, g
- oxygen cylinder — a metal cylinder containing oxygen under pressure
- paedophile ring — a group of people who take part in illegal sexual activity involving children
- 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.
- perfect binding — a technique for binding books by a machine that cuts off the backs of the sections and glues the leaves to a cloth or paper backing.
- phonocardiogram — the graphic record produced by a phonocardiograph.
- pituitary gland — a small, somewhat cherry-shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body, consisting of an anterior region ((anterior pituitary) or (adenohypophysis)) that develops embryonically from the roof of the mouth and that secretes growth hormone, LH, FSH, ACTH, TSH, and MSH, a posterior region ((posterior pituitary) or (neurohypophysis)) that develops from the back of the forebrain and that secretes the hormones vasopressin and oxytocin, and an intermediate part (pars intermedia) derived from the anterior region but joined to the posterior region, that secretes the hormone MSH in lower vertebrates.
- posthole digger — a tool or device for digging a posthole.
- powder magazine — a compartment for the storage of ammunition and explosives.
- prairie-dogging — (in an open-plan office) the practice of looking over the top of one's partition in order to discover the source of or reason for a commotion
- pre-advertising — to announce or praise (a product, service, etc.) in some public medium of communication in order to induce people to buy or use it: to advertise a new brand of toothpaste.
- 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.
- prekindergarten — a school or class for young children between the ages of four and six years.
- prestidigitator — sleight of hand; legerdemain.
- primary winding — an induction coil that is the part of an electric circuit in which a changing current induces a current in a neighbouring circuit
- program trading — trading on international stock exchanges using a computer program to exploit differences between stock index futures and actual share prices on world equity markets
- pseudepigraphon — any book of the Pseudepigrapha
- pyramid selling — Pyramid selling is a method of selling in which one person buys a supply of a particular product direct from the manufacturer and then sells it to a number of other people at an increased price. These people sell it on to others in a similar way, but eventually the final buyers are only able to sell the product for less than they paid for it.
- 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.
- quadragenarians — Plural form of quadragenarian.
- quarter binding — a style of bookbinding in which the spine is leather and the sides are cloth or paper.
- radiant heating — the means of heating objects or persons by radiation in which the intervening air is not heated.
- radiator grille — a grille in an automobile or the like for air cooling of the liquid in the cooling system.
- radio programme — something that is broadcast on radio
- radioautography — autoradiography.
- radiogoniometer — a device used to detect the direction of radio waves, consisting of a coil that is free to rotate within two fixed coils at right angles to each other
- radiogoniometry — the science of detecting the direction of radio waves
- radioimmunology — the study of biological substances or processes with the aid of antigens or antibodies labeled with a radioactive isotope.
- radiophotograph — a photograph or other image transmitted by radio.
- radiotechnology — the technical application of any form of radiation to industry.
- radiotelegraphy — the constructing or operating of radiotelegraphs.
- ramrod straight — having a very straight figure
- random sampling — a method of selecting a sample (random sample) from a statistical population in such a way that every possible sample that could be selected has a predetermined probability of being selected.
- reading glasses — spectacles
- reading the law — that part of the morning service on Sabbaths, festivals, and Mondays and Thursdays during which a passage is read from the Torah scrolls
- receiving order — court order
- record-breaking — top, most successful
- recording angel — an angel who supposedly keeps a record of every person's good and bad acts
- red riding hood — fairytale character
- regimental band — a band made up of a military formation varying in size from a battalion to a number of battalions
- registered bond — a bond recorded in the name of the owner.
- registered mail — prepaid first-class mail that has been recorded at a post office prior to delivery for safeguarding against loss, theft, or damage during transmission.
- registered name — the official or trademark name of something such as a product or company
- registered port — (networking) Any TCP or UDP port with a number in the range 1025 to 65535 (i.e. not a well-known port) that is registered with IANA.
- registered post — a Post Office service by which compensation is paid for loss or damage to mail for which a registration fee has been paid
- religious order — monks: monastery
- rendering plant — a factory where waste products and livestock carcasses are converted into industrial fats and oils (such as tallow, used to make soap) and other products (such as fertilizer)
- rendering works — (used with a singular verb) a factory or plant that renders and processes livestock carcasses into tallow, hides, fertilizer, etc.
- reviewing stand — A reviewing stand is a special raised platform from which military and political leaders watch military parades.