19-letter words containing o, l, e, f, i
- luminous efficiency — the perceived brightness of light as a ratio of the total luminous flux to total radiant flux of the source; a measure of brightness obtained by dividing the source's luminous flux by the consumption of its energy.
- lymphoproliferation — (medicine) the excessive production of lymphocytes.
- lymphoproliferative — Characterized by lymphoproliferation.
- lyon office of arms — Heralds' Office.
- malice aforethought — a predetermination to commit an unlawful act without just cause or provocation (applied chiefly to cases of first-degree murder).
- malicious falsehood — a lie told by someone who knows the lie is false or knows it will do harm to the person it is concerning
- miracle of st. mark — a painting (1548) by Tintoretto.
- negation by failure — An extralogical feature of Prolog and other logic programming languages in which failure of unification is treated as establishing the negation of a relation. For example, if Ronald Reagan is not in our database and we asked if he was an American, Prolog would answer "no".
- network file system — (networking, operating system) (NFS) A protocol developed by Sun Microsystems, and defined in RFC 1094, which allows a computer to access files over a network as if they were on its local disks. This protocol has been incorporated in products by more than two hundred companies, and is now a de facto standard. NFS is implemented using a connectionless protocol (UDP) in order to make it stateless. See Nightmare File System, WebNFS.
- non-confidentiality — spoken, written, acted on, etc., in strict privacy or secrecy; secret: a confidential remark.
- non-transferability — to convey or remove from one place, person, etc., to another: He transferred the package from one hand to the other.
- nonforfeiture value — any benefit, as cash or other form of insurance, available to a life-insurance policyholder who discontinues premium payments on the policy.
- nordrhein-westfalen — German name of North Rhine-Westphalia.
- norfolk island pine — a coniferous evergreen tree, Araucaria heterophylla (or A. excelsa), having whorled branches and needlelike foliage, widely cultivated as a houseplant.
- off-highway vehicle — An off-highway vehicle is a vehicle, such as one used for construction or agriculture, that is intended for use on steep or uneven ground.
- office-block ballot — a ballot on which the candidates are listed alphabetically, with or without their party designations, in columns under the office for which they were nominated.
- oriental fruit moth — a moth, Grapholitha molesta, introduced into the U.S. from Asia, the larvae of which infest and feed on the twigs and fruits of peach, plum, and related trees.
- perfoliate bellwort — a slender plant, Uvularia perfoliata, of the lily family, of eastern North America, having pale yellow, bell-shaped flowers.
- peroxysulfuric acid — persulfuric acid (def 1).
- phacoemulsification — the removal of a cataract by first liquefying the affected lens with ultrasonic vibrations and then extracting it by suction.
- phakoemulsification — the removal of a cataract by first liquefying the affected lens with ultrasonic vibrations and then extracting it by suction.
- photovoltaic effect — the phenomenon in which the incidence of light or other electromagnetic radiation upon the junction of two dissimilar materials, as a metal and a semiconductor, induces the generation of an electromotive force.
- pilgrimage of grace — a rebellion in 1536 in N England against the Reformation and Henry VIII's government
- pillars of hercules — the two promontories at the E end of the Strait of Gibraltar: the Rock of Gibraltar on the European side and the Jebel Musa on the African side; according to legend, formed by Hercules
- pistol-handle knife — a table knife, especially of the 18th century, having a slightly curved handle resembling the grip of a flintlock pistol.
- plastic deformation — In plastic deformation a material changes shape when a stress is applied to it and does not go back to its original state when the stress is removed.
- play footsie (with) — to touch feet or rub knees (with) in a caressing way, as under the table
- point of inflection — inflection point.
- post office problem — (algorithm) Given a set of points (in N dimensions), find another point which minimises the sum of the distances from that point to each of the others.
- post-and-rail fence — a fence constructed of upright wooden posts with horizontal timber slotted through it
- potassium bisulfate — a colorless, crystalline, water-soluble solid, KHSO 4 , used chiefly in the conversion of tartrates to bitartrates.
- preferential voting — a system of voting designed to permit the voter to indicate an order of preference for the candidates on the ballot.
- pride-of-california — a shrubby plant, Lathyrus splendens, of the legume family, native to southern California, having showy clusters of pale rose-pink, violet, or magenta flowers and large, smooth, beaked pods.
- professional advice — advice given by someone trained in a particular and relevant profession or job
- professional school — a postgraduate school or college which trains students for a particular profession
- professionalization — to give a professional character or status to; make into or establish as a profession.
- pseudo-professional — following an occupation as a means of livelihood or for gain: a professional builder.
- radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
- reciprocity failure — a failure of the two exposure variables, light intensity and exposure time, to behave in a reciprocal fashion at very high or very low values
- reflux oesophagitis — inflammation of the gullet caused by regurgitation of stomach acids, producing heartburn: may be associated with a hiatus hernia
- relief organization — humanitarian group
- republic of ireland — John, 1838–1918, U.S. Roman Catholic clergyman and social reformer, born in Ireland: archbishop of St. Paul, Minn., 1888–1918.
- republic of letters — the collective body of literary people.
- republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
- research fellowship — the position or office of someone who conducts academic research into a subject at a university, etc
- resign oneself (to) — to submit or become reconciled (to); accept (something) passively
- respiratory failure — a condition in which the respiratory system is unable to provide an adequate supply of oxygen or to remove carbon dioxide efficiently
- reticular formation — a network of neurons in the brainstem involved in consciousness, regulation of breathing, the transmission of sensory stimuli to higher brain centers, and the constantly shifting muscular activity that supports the body against gravity.
- revival of learning — the Renaissance in its relation to learning, especially in literature (Revival of Literature or Revival of Letters)
- right-eyed flounder — any of several flatfishes of the family Pleuronectidae, having both eyes on the right side of the head.