21-letter words containing per
- afternoon performance — a performance during the afternoon, rather than the evening
- application developer — (job) Someone who does application development.
- brazilian pepper tree — a small Brazilian evergreen tree or shrub, Schinus terebinthifolius, of the cashew family, having inconspicuous white flowers and bright red fruit: the berries are used for Christmas decorations.
- conditional operation — a step in a computer program that determines which of two or more instructions or instruction sequences to execute next, depending on whether or not one or more specified conditions have been met.
- controlled experiment — an experiment or trial that uses controls, usually separating the subjects into one or more control groups and experimental groups.
- cooperative apartment — a block of flats belonging to a corporation in which shares are owned in proportion to the relative value of the flat occupied
- cooperative-apartment — working or acting together willingly for a common purpose or benefit.
- counsel of perfection — excellent but unrealizable advice
- dew-point temperature — the temperature to which air must be cooled, at a given pressure and water-vapor content, for it to reach saturation; the temperature at which dew begins to form.
- differential operator — a function, usually expressed as a polynomial, that indicates linear combinations of the derivatives of the expression on which it operates.
- disk operating system — DOS.
- distributive property — Mathematics. the property that terms in an expression may be expanded in a particular way to form an equivalent expression.
- equiangular hyperbola — a hyperbola with transverse and conjugate axes equal to each other.
- euro-commercial paper — commercial paper issued in a eurocurrency
- functional imperative — a requirement for the survival of any social system, as communication, control of conflict, or socialization.
- girlfriend experience — a service provided by a prostitute that includes more personal activity, such as kissing, than provided traditionally by sex workers
- hawaiian honeycreeper — any small to medium-sized finches of the subfamily Drepanidinae, native to the Hawaiian Islands and including many rare and extinct species.
- help a person on with — to assist a person in the putting on of (clothes)
- hyperbolic paraboloid — a paraboloid that can be put into a position such that its sections parallel to one coordinate plane are hyperbolas, with its sections parallel to the other two coordinate planes being parabolas.
- hypercholesterolaemia — the condition of having a high concentration of cholesterol in the blood
- hyperkinetic disorder — another name for attention deficit hyperactivity disorder (ADHD)
- hyperlipoproteinaemia — the condition of having an abnormally high level of lipoproteins in the blood
- identification papers — documents that serve to establish someone's identity
- imperfect competition — economics: when sb has excessive influence on market price
- intellectual property — Law. property that results from original creative thought, as patents, copyright material, and trademarks.
- interpersonal therapy — a type of psychotherapy that focuses on conflicts in one's personal relationships.
- madagascar periwinkle — a plant, Catharanthus roseus (or Vinca rosea), cultivated for its glossy foliage and pink or white flowers.
- magnetic permeability — permeability (def 2).
- marine superintendent — a person who is responsible for the maintenance of the vessels of a shipping line, for their docking and the handling of cargo, and for the hiring of personnel for deck departments.
- mass-market paperback — a relatively inexpensive paperbound book, typically measuring about 4½ × 7 inches (11 × 18 cm), that is distributed on newsstands, in supermarkets, etc., as well as in bookstores.
- multilayer perceptron — A network composed of more than one layer of neurons, with some or all of the outputs of each layer connected to one or more of the inputs of another layer. The first layer is called the input layer, the last one is the output layer, and in between there may be one or more hidden layers.
- naturalization papers — documents confirming that someone has been awarded citizenship of a country he or she was not born in
- near-death experience — A near-death experience is a strange experience that some people who have nearly died say they had when they were unconscious.
- no less a person than — a person of no lower importance, rank, etc. than
- one-point perspective — a mathematical system for representing three-dimensional objects and space on a two-dimensional surface by means of intersecting lines that are drawn vertically and horizontally and that radiate from one point (one-point perspective) two points (two-point perspective) or several points on a horizon line as perceived by a viewer imagined in an arbitrarily fixed position.
- operational amplifier — a high-gain, high-input impedance amplifier, usually an integrated circuit, that can perform mathematical operations when suitably wired.
- operational semantics — (theory) A set of rules specifying how the state of an actual or hypothetical computer changes while executing a program. The overall state is typically divided into a number of components, e.g. stack, heap, registers etc. Each rule specifies certain preconditions on the contents of some components and their new contents after the application of the rule. It is similar in spirit to the notion of a Turing machine, in which actions are precisely described in a mathematical way. Compuare axiomatic semantics, denotational semantics.
- paper over the cracks — conceal flaws or problems
- paper-white narcissus — a white-flowered variety of Narcissus tazetta, often forced for indoor bloom.
- per second per second — a unit used for acceleration when the change in velocity per second is divided by the change in time, which is also in seconds: e.g., if the velocity increased from 5 meters per second to 20 meters per second in a time interval of one second, the acceleration would be 15 meters per second per second (15 m/sec./sec. or 15/m/sec.2)
- percussion instrument — a musical instrument, as the drum, cymbal, triangle, xylophone, or piano, that is struck to produce a sound, as distinguished from string or wind instruments.
- performance appraisal — the assessment, at regular intervals, of an employee's performance at work
- performance indicator — a quantitative or qualitative measurement, or any other criterion, by which the performance, efficiency, achievement, etc of a person or organization can be assessed, often by comparison with an agreed standard or target
- performance-enhancing — noting or relating to a drug or other substance used to improve one's performance in a sport or other activity requiring strength, stamina, etc.: The use of performance-enhancing steroids by athletes is banned.
- peroxydisulfuric acid — persulfuric acid (def 2).
- persistence of memory — a painting (1931) by Salvador Dali.
- persistence of vision — the retention of a visual image for a short period of time after the removal of the stimulus that produced it: the phenomenon that produces the illusion of movement when viewing motion pictures.
- person-to-person call — a call to a specified person; if that person cannot take the call there is no charge
- personality inventory — a questionnaire designed to measure personality types or characteristics.
- personalized medicine — an approach to the practice of medicine that uses information about a patient’s unique genetic makeup and environment to customize the patient's medical care to fit his or her individual requirements.
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