| / English Dictionary |
H
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
(thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
Example:
enthalpy is the amount of energy in a system capable of doing mechanical work
Synonyms:
enthalpy; H; heat content; total heat
Classified under:
Nouns denoting attributes of people and objects
Hypernyms ("H" is a kind of...):
physical property (any property used to characterize matter and energy and their interactions)
Domain category:
thermodynamics (the branch of physics concerned with the conversion of different forms of energy)
Sense 2
Meaning:
The 8th letter of the Roman alphabet
Classified under:
Nouns denoting communicative processes and contents
Hypernyms ("H" is a kind of...):
alphabetic character; letter; letter of the alphabet (the conventional characters of the alphabet used to represent speech)
Holonyms ("H" is a member of...):
Latin alphabet; Roman alphabet (the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe)
Sense 3
Meaning:
The constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
Synonyms:
Classified under:
Nouns denoting quantities and units of measure
Hypernyms ("h" is a kind 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)
Sense 4
Meaning:
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
Synonyms:
H; henry
Classified under:
Nouns denoting quantities and units of measure
Hypernyms ("H" is a kind of...):
inductance unit (a measure of the property of an electric circuit by which an electromotive force is induced in it)
Meronyms (parts of "H"):
abhenry (a unit of inductance equal to one billionth of a henry)
millihenry (a unit of inductance equal to one thousandth of a henry)
Sense 5
Meaning:
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
Synonyms:
Classified under:
Hypernyms ("H" is a kind 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)
Hyponyms (each of the following is a kind of "H"):
tritium (a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms)
Holonyms ("H" is a substance of...):
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)
Context examples:
In recent years, the Max-Planck Institute for Astronomy's H.E.S.S. experiment has identified more than 80 incredibly powerful sites of gamma rays, called high-energy gamma-ray sources, in our Milky Way.
(Pulse of a Dead Star Powers Intense Gamma Rays, NASA)
On Sept. 19, ‘Oumuamua sped past the Sun at about 196,000 mph (315,400 km/h), fast enough to escape the Sun’s gravitational pull and break free of the solar system, never to return.
(New Study Shows What Interstellar Visitor ‘Oumuamua Can Teach Us, NASA)
Then ‘J.H.N.’ are the only initials we have to solve.
(The Return of Sherlock Holmes, by Sir Arthur Conan Doyle)
Oltipraz induces phase II detoxification enzymes, such as glutathione S transferase (GST) and NAD(P)H:quinone oxidoreductase 1 (NQO1).
(Oltipraz, NCI Thesaurus)
Expression of the allele is altered in non-Hodgkin lymphoma patients by a three-way translocation t(8;14;12)(q24.1;q32.3;q24.1) with the MYC gene and the immunoglobulin H locus.
(BCL7A wt Allele, NCI Thesaurus)
He said that letters to the Hôtel du Louvre, Paris, would eventually reach him.
(His Last Bow, by Sir Arthur Conan Doyle)
And then—ah-h-h-h!—she shivered and chattered like one in an ague-fit.
(The White Company, by Sir Arthur Conan Doyle)
A measurement of the apolipoprotein H in a biological specimen.
(Apolipoprotein H Measurement, NCI Thesaurus/CDISC)
On the inside of the flap he wrote “S. H. for J. O.”
(The Adventures of Sherlock Holmes, by Sir Arthur Conan Doyle)
These enzymes may be dependent on Ca(2+), Mg(2+), anions, H+, or DNA.
(ATPase, NCI Thesaurus)
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