| Anarchism Anarchism is a political philosophy encompassing theories and attitudes which support the elimination of all compulsory government,*Errico Malatesta, "Towards Anarchism", MAN!. Los Angeles: International Group of San Francisco. Anarchism
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| Autism | ICD9 = 299.0 Autism
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| Albedo The albedo of an object is the extent to which it diffusely reflects light from the sun. It is therefore a more specific form of the term reflectivity. Albedo
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| Alabama |Governor = Robert R. Riley (R) Alabama
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| Achilles In Greek mythology, Achilles (also Akhilleus or Achilleus; Ancient Greek: ) was a Greek hero of the Trojan War, the central character and the greatest warrior of Homer's Iliad, which takes for its theme the Wrath of Achilles. Achilles
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| Altruism Altruism is selfless concern for the welfare of others. It is a traditional virtue in many cultures, and central to many religious traditions. Altruism
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| Amphibian Amphibians (class Amphibia), such as frogs, toads, salamanders, newts, and gymnophiona, are cold-blooded animals that metamorphose from a juvenile, water-breathing form to an adult, air-breathing form. Typically, amphibians have four limbs. Amphibian
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| Agriculture Agriculture refers to the production of goods through the growing of plants and the raising of domesticated animals. The study of agriculture is known as agricultural science. Agriculture
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| Algae Algae (sing. alga) are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms. Algae
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| Alkane Alkanes, also known as paraffins, are chemical compounds that consist only of the elements carbon (C) and hydrogen (H) (i.e. Alkane
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| A Modest Proposal A Modest Proposal: For Preventing the Children of Poor People in Ireland from Being a Burden to Their Parents or Country, and for Making Them Beneficial to the Public, commonly referred to as A Modest Proposal, is a satirical essay written and published by Jonathan Swift in 1729. Swift appears to suggest in his essay that the impoverished Irish might ease their economic troubles by selling children as food for rich gentlemen and ladies. A_Modest_Proposal
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| Alkali metal The alkali metals are a series of chemical elements comprising Group 1 (IUPAC style) of the periodic table: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). (Hydrogen, although nominally also a member of Group 1, very rarely exhibits behavior comparable to the alkali metals). Alkali_metal
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| Albert Einstein | birth_place = Ulm, Württemberg, Germany Albert_Einstein
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| Aikido | aka = Aikido
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| Agnostida Agnostida (the agnostids) is an order of trilobite. These small trilobites first appeared toward the end of the Early Cambrian and thrived in the Middle Cambrian. Agnostida
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| Abortion An abortion is the termination of a pregnancy by the removal or expulsion of a embryo or fetus from the uterus, resulting in or caused by its death. An abortion can occur spontaneously due to complications during pregnancy or can be induced. Abortion
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| Algorithm In mathematics, computing, linguistics and related subjects, an algorithm is a sequence of finite instructions, often used for calculation and data processing. It is formally a type of effective method in which a list of well-defined instructions for completing a task will, when given an initial state, proceed through a well-defined series of successive states, eventually terminating in an end-state. Algorithm
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| Anthophyta The anthophytes were thought to be a clade comprising plants bearing flower-like structures. The group contained the angiosperms - the extant flowering plants - as well as the Gnetales and the extinct Bennettitales. Anthophyta
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| Asterales The Asterales are an order of dicotyledonous flowering plants which include the composite family Asteraceae (sunflowers, daisies, thistles etc.) and its related families. Asterales
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| Asteroid Asteroids, sometimes called minor planets or planetoids, are bodies—primarily of the inner Solar System—that are smaller than planets but larger than meteoroids (commonly defined as being 10 meters across or less), with the exception of comets. The distinction between asteroids and comets is made on visual appearance when discovered: Comets show a perceptible coma (a fuzzy "atmosphere"), while asteroids do not. Asteroid
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| Altaic languages Altaic, according to its proponents, is a language family that includes 66 languagesAltaic languages spoken by about 348 million people, mostly in and around Central Asia and northeast Asia.Altaic Language Family Tree Ethnologue report for Altaic. Altaic_languages
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| Axiom of choice In mathematics, the axiom of choice, or AC, is an axiom of set theory. Informally put, the axiom of choice says that given any collection of bins, each containing at least one object, it is possible to make a selection of exactly one object from each bin, even if there are infinitely many bins and there is no "rule" for which object to pick from each. Axiom_of_choice
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| Ancient Egypt Ancient Egypt was an ancient civilization in eastern North Africa, concentrated along the lower reaches of the Nile River in what is now the modern nation of Egypt. The civilization began around 3150 BCOnly after 664 BC are dates secure. Ancient_Egypt
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| Motor neurone disease Motor_neurone_disease
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| Argon Argon () is a chemical element designated by the symbol Ar. Argon has atomic number 18 and is the third element in group 18 of the periodic table (noble gases). Argon
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| Arsenic Arsenic () is a chemical element that has the symbol As and atomic number of 33. Arsenic was first documented by Albertus Magnus in 1250. Arsenic
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| Actinium Actinium () is a chemical element with the symbol Ac and atomic number 89. Actinium
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| Americium Americium () is a synthetic element that has the symbol Am and atomic number 95. A radioactive metallic element, americium is an actinide that was obtained in 1944 by bombarding plutonium with neutrons and was the fourth transuranic element to be discovered. Americium
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| Astatine Astatine () is a radioactive chemical element with the symbol At and atomic number 85. It is the heaviest of the discovered halogens. Astatine
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| Atom |- Atom
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| Aluminium Aluminium (, ) or aluminum (, see spelling below) is a silvery white and ductile member of the boron group of chemical elements. It has the symbol Al; its atomic number is 13. Aluminium
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| Anxiety | ICDO = Anxiety
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| Addiction The term "addiction" is used in many contexts to describe an obsession, compulsion, or excessive physical dependence or psychological dependence, such as: drug addiction, alcoholism, compulsive overeating, problem gambling, computer addiction, etc. Addiction
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| Asteraceae Eocene - Recent Asteraceae
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| Acute disseminated encephalomyelitis Acute_disseminated_encephalomyelitis
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| Ada Lovelace |image =Ada Lovelace 1838.jpg Ada_Lovelace
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| Alcohol In chemistry, an alcohol is any organic compound in which a hydroxyl group (-OH) is bound to a carbon atom of an alkyl or substituted alkyl group. The general formula for a simple acyclic alcohol is CnH2n+1OH. Alcohol
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| Abscess Abscess
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| Avicenna Avicenna
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| Ardipithecus Ardipithecus is a very early hominin genus (subfamily Homininae) which lived about 4.4 million years ago during the early Pliocene. Ardipithecus
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| Artificial intelligence Artificial intelligence (AI) is the intelligence of machines and the branch of computer science which aims to create it. Artificial_intelligence
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| Amino acid In chemistry, an amino acid is a molecule containing both amine and carboxyl functional groups. In biochemistry, this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent. Amino_acid
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| Alan Turing | birth_place = London, England Alan_Turing
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| American (word) Use of the word American in the English language differs according to the historic, geographic, and political context in which it is used. It derives from America, a term originally denoting all of the New World (also the Americas), and its usage has evolved. American_(word)
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| Ada (programming language) Ada is a structured, statically typed, imperative, and object-oriented high-level computer programming language based on Pascal. It was originally designed by a team led by Jean Ichbiah of CII Honeywell Bull under contract to the United States Department of Defense during 1977–1983 to supersede the hundreds of programming languages then used by the US Department of Defense (DoD). Ada_(programming_language)
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| Abalone Abalone (from Spanish Abulón) are medium-sized to very large edible sea snails, marine gastropod mollusks in the family Haliotidae and the genus Haliotis. Abalone
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| Antimatter In particle physics and quantum chemistry, antimatter is the extension of the concept of the antiparticle to matter, where antimatter is composed of antiparticles in the same way that normal matter is composed of particles. For example, an antielectron (a positron, an electron with a positive charge) and an antiproton (a proton with a negative charge) could form an antihydrogen atom in the same way that an electron and a proton form a normal matter hydrogen atom. Antimatter
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| Apatosaurus Apatosaurus (), also formerly known as Brontosaurus, is a genus of sauropod dinosaur that lived about 150 million years ago, during the Jurassic Period (Kimmeridgian and Tithonian ages). It was one of the largest land animals that ever existed, with an average length of 23 meters (75 ft) and a mass of at least 23 metric tons (25 short tons). Apatosaurus
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| Allosaurus Allosaurus () is a genus of large theropod dinosaur that lived 155 to 145 million years ago, in the late Jurassic period. The name Allosaurus means "different lizard" and is derived from the Greek αλλος/allos ("different, strange") and σαυρος/sauros ("lizard"). Allosaurus
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| Anchor An anchor is an object, often made out of metal, that is used to attach a ship to the bottom of a body of water at a specific point. There are two primary classes of anchors—temporary and permanent. Anchor
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