17-letter words containing o, r, g
- origin of species — (On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life) a treatise (1859) by Charles Darwin setting forth his theory of evolution.
- orthogonal matrix — a matrix that is the inverse of its transpose so that any two rows or any two columns are orthogonal vectors
- orthogonalization — (mathematics) The process of converting a set of functions or vectors into orthogonal ones.
- osculating circle — circle of curvature.
- otolaryngological — Pertaining to otolaryngology.
- otolaryngologists — Plural form of otolaryngologist.
- outline agreement — a contract, etc, setting out the preliminary terms or guidelines for an agreement; a preliminary agreement
- overhead lighting — lighting which throws light downwards by being situated on the ceiling or having a downward shade, etc
- overnight success — sth or sb suddenly popular
- oversquare engine — An oversquare engine is an engine which has a cylinder bore that is larger than its stroke.
- pacific tree frog — a common terrestrial frog, Hyla regilla, of western North America, having a dark stripe along each side of the head.
- palaeoarchaeology — the branch of archaeology concerned with the earliest fossil remains
- paleoanthropology — the study of the origins and predecessors of the present human species, using fossils and other remains.
- paleobiogeography — the study of the distribution of ancient plants and animals and their relation to ancient geographic features.
- parallelogram law — Mathematics, Physics. a rule for adding two vectors, as forces (parallelogram of forces) by placing the point of application of one at the point of origin of the other and obtaining their sum by constructing the line connecting the two remaining end points, the sum being the diagonal of the parallelogram whose adjacent sides are the two vectors.
- parathyroid gland — any of several small oval glands usually lying near or embedded in the thyroid gland.
- passenger station — a station used by passengers
- pastoral theology — the branch of theology dealing with the responsibilities of members of the clergy to the people under their care.
- pate de foie gras — See under foie gras.
- pathological liar — a person who tells lies frequently, with no rational motive for doing so.
- perforation gauge — a marked ruler used to measure the number of perforations per unit length along the borders of a stamp.
- performance drugs — the drugs that are taken illegally by athletes to enhance their sporting performance
- permutation group — a mathematical group whose elements are permutations and in which the product of two permutations is the same permutation as is obtained by performing them in succession.
- persona non grata — a person who is not welcome: He has become persona non grata in our club since his angry outburst.
- personnel manager — head of Human Resources department
- petit bourgeoisie — The petit bourgeoisie are people in the lower middle class.
- petite bourgeoise — a woman who belongs to the petite bourgeoisie.
- petty bourgeoisie — the section of the middle class with the lowest social status, generally composed of shopkeepers, lower clerical staff, etc
- phantom pregnancy — the occurrence of signs of pregnancy, such as enlarged abdomen and absence of menstruation, when no embryo is present, due to hormonal imbalance
- pharmacologically — the science dealing with the preparation, uses, and especially the effects of drugs.
- philosopher kings — the Platonic ideal of a ruler, philosophically trained and enlightened.
- phonological rule — an operation in generative phonology that substitutes one sound or class of sounds for another in a phonological derivation.
- photofluorography — photography of images produced by a fluoroscopic examination, used in x-ray examination of the lungs of large groups of people.
- pillion passenger — a person who travels in a seat or place behind the rider of a motorcycle, scooter, horse, etc
- pioneering spirit — a willingness to endure hardship in order to explore new places or try out new things
- pitching rotation — the regular, scheduled succession of starting pitchers designated by a manager: a four-man pitching rotation in September.
- pointer swizzling — swizzle
- poison-arrow frog — a small, bright-colored terrestrial frog of the family Dendrobatidae, of Central and South American rain forests, that secretes a virulent poison from its skin, once used on the tips of Indian hunting arrows.
- polarizing filter — a camera lens filter used to control the plane of polarization of light entering the lens.
- political refugee — a person who has fled from a homeland because of political persecution.
- poor man's orange — a grapefruit
- popular etymology — folk etymology.
- portfolio manager — a person employed by others to make investments for them
- portuguese guinea — former name of Guinea-Bissau.
- postural drainage — a therapy for clearing congested lungs by placing the patient in a position for drainage by gravity, often accompanied by percussion with hollowed hands.
- powder metallurgy — the art or science of manufacturing useful articles by compacting metal and other powders in a die, followed by sintering.
- pre-configuration — the relative disposition or arrangement of the parts or elements of a thing.
- pre-investigation — the act or process of investigating or the condition of being investigated.
- pre-technological — of or relating to technology; relating to science and industry.
- precision bombing — aerial bombing in which bombs are dropped, as accurately as possible, on a specific, usually small, target.