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 (synset 114664612)
    is a type of:
    • chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
    • gas - a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
    subtypes: tritium - a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms
    substance meronym: h2o, water - binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
    same as: atomic number 1, hydrogen
  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 (synset 113660884)
    is a type of: inductance unit - a measure of the property of an electric circuit by which an electromotive force is induced in it
    has:
    • abhenry - a unit of inductance equal to one billionth of a henry
    • millihenry - a unit of inductance equal to one thousandth of a henry
    same as: henry
  3. The constant of proportionality relating the energy of a photon to its frequency;
    Approximately 6.626 x 10^-34 joule-second (synset 113612326)
    is a type of: constant of proportionality, factor of proportionality - the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality
    same as: planck's constant
  4. The 8th letter of the Roman alphabet (synset 106844976)
    is a type of: alphabetic character, letter, letter of the alphabet - the conventional characters of the alphabet used to represent speech
    belongs to: latin alphabet, roman alphabet - the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe
  5. (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure (synset 105019456)
    "enthalpy is the amount of energy in a system capable of doing mechanical work"
    referred to in: thermodynamics - the branch of physics concerned with the conversion of different forms of energy
    is a type of: physical property - any property used to characterize matter and energy and their interactions
    same as: enthalpy, heat content, total heat

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