21-letter words containing f, l, e, d, r, m
- bichloride of mercury — mercuric chloride
- black-headed fireworm — the larva of any of several moths, as Rhopobota naevana (black-headed fireworm) which feeds on the leaves of cranberries and causes them to wither.
- bromine pentafluoride — a colorless, corrosive liquid, BrF 5 , used as an oxidizer in liquid rocket propellants.
- chloroformyl chloride — phosgene.
- clement of alexandria — Saint. original name Titus Flavius Clemens. ?150–?215 ad, Greek Christian theologian: head of the catechetical school at Alexandria; teacher of Origen. Feast day: Dec 5
- clostridium difficile — Clostridium difficile is a bacterium that causes severe diarrhoea. It is commonly found in hospitals. C.diff is also used.
- collimator viewfinder — a type of viewfinder in a camera
- come in from the cold — to come out of exile, isolation, etc.; resume an active role
- comfortably-furnished — containing comfortable furniture
- cosmological redshift — the part of the redshift of celestial objects resulting from the expansion of the universe.
- dark-field microscope — ultramicroscope
- differential geometry — the branch of mathematics that deals with the application of the principles of differential and integral calculus to the study of curves and surfaces.
- dumfries and galloway — a region in S Scotland. 2460 sq. mi. (6371 sq. km).
- electromagnetic field — a field of force associated with a moving electric charge equivalent to an electric field and a magnetic field at right angles to each other and to the direction of propagation
- faculty board meeting — a meeting of the governing body of a faculty
- false memory syndrome — a psychological condition in which a person believes that he or she remembers events that have not actually occurred.
- false-memory syndrome — a psychological condition in which a person believes that he or she remembers events that have not actually occurred.
- ferric sodium oxalate — an emerald-green, crystalline, extremely water-soluble salt, used in photography and blueprinting.
- flip someone the bird — give someone the finger (see phrase under finger)
- frederick william iii — 1770–1840, king of Prussia 1797–1840.
- fundamental frequency — the lowest frequency at which a medium will freely oscillate.
- gentleman of the road — a highwayman.
- lady windermere's fan — a comedy (1892) by Oscar Wilde.
- lafayette, marquis de — Marie Joseph Paul Yves Roch Gilbert du Motier [ma-ree zhaw-zef pawl eev rawk zheel-ber dy maw-tyey] /maˈri ʒɔˈzɛf pɔl iv rɔk ʒilˈbɛr dü mɔˈtyeɪ/ (Show IPA), Marquis de. Also, La Fayette. 1757–1834, French soldier, statesman, and liberal leader, who served in the American Revolutionary Army as aide-de-camp to General Washington, and took a leading part in the French revolutions of 1789 and 1830.
- law of thermodynamics — any of three principles variously stated in equivalent forms, being the principle that the change of energy of a thermodynamic system is equal to the heat transferred minus the work done (first law of thermodynamics) the principle that no cyclic process is possible in which heat is absorbed from a reservoir at a single temperature and converted completely into mechanical work (second law of thermodynamics) and the principle that it is impossible to reduce the temperature of a system to absolute zero in a finite number of operations (third law of thermodynamics)
- magnificent riflebird — a bird of paradise, Craspedophora magnifica
- mother-of-pearl cloud — nacreous cloud.
- semantic differential — a technique for measuring the connotative meaning of concepts by having an individual rate each concept on a series of graduated scales, each scale defined by a pair of polar adjectives, as good–bad or strong–weak.
- stem-and-leaf diagram — a histogram in which the data points falling within each class interval are listed in order
- the middle of nowhere — remote place
- to risk life and limb — If someone risks life and limb, they do something very dangerous that may cause them to die or be seriously injured.
- universal disk format — (storage, standard) (UDF) A CD-ROM file system standard that is required for DVD ROMs. UDF is the OSTA's replacement for the ISO 9660 file system used on CD-ROMs, but will be mostly used on DVD. DVD multimedia disks use UDF to contain MPEG audio and video streams. To read DVDs you need a DVD drive, the kernel driver for the drive, MPEG video support, and a UDF driver. DVDs containing both UDF filesystems and ISO 9660 filesystems can be read without UDF support. UDF can also be used by CD-R and CD-RW recorders in packet writing mode.
- weak head normal form — (reduction, theory) (WHNF) A lambda expression is in weak head normal form (WHNF) if it is a head normal form (HNF) or any lambda abstraction. I.e. the top level is not a redex. The term was coined by Simon Peyton Jones to make explicit the difference between head normal form (HNF) and what graph reduction systems produce in practice. A lambda abstraction with a reducible body, e.g. \ x . ((\ y . y+x) 2) is in WHNF but not HNF. To reduce this expression to HNF would require reduction of the lambda body: (\ y . y+x) 2 --> 2+x Reduction to WHNF avoids the name capture problem with its need for alpha conversion of an inner lambda abstraction and so is preferred in practical graph reduction systems. The same principle is often used in strict languages such as Scheme to provide call-by-name evaluation by wrapping an expression in a lambda abstraction with no arguments: D = delay E = \ () . E The value of the expression is obtained by applying it to the empty argument list:
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