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h

Babylon English English dictionary

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h
n. eighth letter of the English alphabet
 
H (hydrogen)
n. colorless odorless gas (lightest of the known elements)

Wikipedia English The Free Encyclopedia

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H
H, or h is a consonant in Esperanto orthography, representing a voiceless velar fricative  or voiceless uvular fricative . Its name in Esperanto is ho (pronounced ).

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H (named aitch , plural aitches; is the eighth letter in the ISO basic Latin alphabet.

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H with stroke
H (minuscule: h) is a letter of the Latin alphabet, derived from H with the addition of a bar. It is used in Maltese for a voiceless pharyngeal fricative consonant (corresponding to the letter heth of Semitic abjads). Lowercase is used in the International Phonetic Alphabet for the same sound.

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H+
H+ or h+ may refer to:

Science and technology

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H.
"H." is a song by the American rock band Tool. The song was released as the second single from their second album, Ænima, and reached number 23 on the U.S. Mainstream Rock Tracks chart.

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Hadouken!
Hadouken! is a British band and was formed in London in 2006 by singer, writer and producer James Smith, alongside his girlfriend, synth player Alice Spooner, with guitarist Daniel "Pilau" Rice, bassist Christopher Purcell and drummer Nick Rice. The band name is taken from the name of the special attack of the same name from the Street Fighter video game series. It was in Leeds that Hadouken! began their own record label, Surface Noise Records.

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Hamiltonian mechanics
Hamiltonian mechanics is a theory developed as a reformulation of classical mechanics and predicts the same outcomes as non-Hamiltonian classical mechanics. It uses a different mathematical formalism, providing a more abstract understanding of the theory. Historically, it was an important reformulation of classical mechanics, which later contributed to the formulation of quantum mechanics.

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Hydride
In chemistry, a hydride is the anion of hydrogen, H-, or, more commonly, an alloy, or compound in which one or more hydrogen centres have nucleophilic, reducing, or basic properties. In compounds that are regarded as hydrides, hydrogen is bonded to a more electropositive element or group. Compounds containing hydrogen bonded to metals or metalloid may be referred to as hydrides, even though these hydrogen centres can have a protic character. Almost all of the elements form binary compounds with hydrogen, the exceptions being He Ne ArKrPmOsIrRnFrRa.

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Include directive
Many programming languages and other computer files have a directive, often called include (as well as copy and import), that causes the contents of a second file to be inserted into the original file. These included files are called copybooks or header files. They are often used to define the physical layout of program data, pieces of procedural code and/or forward declarations while promoting encapsulation and the reuse of code.

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Macron below
Macron below, , is a combining diacritical mark used in various orthographies.

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Planck constant
The Planck constant (denoted h, also called Planck's constant) is a physical constant that is the quantum of action in quantum mechanics. Published in 1900, it originally described the proportionality constant between the energy (E) of a charged atomic oscillator in the wall of a black body, and the frequency (ν) of its associated electromagnetic wave. Its relevance is now integral to the field of quantum mechanics, describing the relationship between energy and frequency, commonly known as the Planck relation:

In 1905 the value (E), the energy of a charged atomic oscillator, was theoretically associated with the energy of the electromagnetic wave itself, representing the minimum amount of energy required to form an electromagnetic field (a "quantum"). Further investigation of quanta revealed behaviour associated with an independent unit ("particle") as opposed to an electromagnetic wave and was eventually given the term photon. The Planck relation now describes the energy of each photon in terms of the photon's frequency. This energy is extremely small in terms of ordinary experience.

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Quaternion
In mathematics, the quaternions are a number system that extends the complex numbers. They were first described by Irish mathematician William Rowan Hamilton in 1843 and applied to mechanics in three-dimensional space. A feature of quaternions is that multiplication of two quaternions is noncommutative. Hamilton defined a quaternion as the quotient of two directed lines in a three-dimensional space or equivalently as the quotient of two vectors.

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WordNet 2.0 Dictionary

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H

Noun
1. a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
(synonym) hydrogen, atomic number 1
(hypernym) chemical element, element
(hyponym) tritium
(substance-holonym) water, H2O
2. a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second
(synonym) henry
(hypernym) inductance unit
(part-meronym) abhenry
3. the 8th letter of the Roman alphabet
(hypernym) letter, letter of the alphabet, alphabetic character
(member-holonym) Roman alphabet, Latin alphabet
4. (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure; "enthalpy is the amount of energy in a system capable of doing mechanical work"
(synonym) heat content, total heat, enthalpy
(hypernym) physical property
(classification) thermodynamics

 
h

Noun
1. the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10\-34 joule-second
(synonym) Planck's constant
(hypernym) factor of proportionality, constant of proportionality


Babylon German English dictionary

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H (das)
n. h, eighth letter of the English alphabet

Babylon French English dictionary

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h
nf. h, eighth letter of the English alphabet


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