|a mark (‸) made in written or printed matter to show the place where something is to be inserted.|
|a paragraph mark.|
|h or H (eɪtʃ)|
|—n , pl h's, H's, Hs|
|1.||the eighth letter and sixth consonant of the modern English alphabet|
|2.||a speech sound represented by this letter, in English usually a voiceless glottal fricative, as in hat|
|3.||a. something shaped like an H|
|b. (in combination): an H-beam|
|H or H|
|a. magnetic field strength|
|3.||electronics henry or henries|
|5.||Compare B (on Brit pencils, signifying degree of hardness of lead) hard: H; 2H; 3H|
|7.||Hungary (international car registration)|
|h. or H.|
|H. or H.|
|h. or H.|
|H. or H.|
The symbol for Planck's constant..
The symbol for the element hydrogen.
|hydrogen (hī'drə-jən) Pronunciation Key
The lightest and most abundant element in the universe, normally consisting of one proton and one electron. It occurs in water in combination with oxygen, in most organic compounds, and in small amounts in the atmosphere as a gaseous mixture of its three isotopes (protium, deuterium, and tritium) in the colorless, odorless compound H2. Hydrogen atoms are relatively electropositive and form hydrogen bonds with electronegative atoms. In the Sun and other stars, the conversion of hydrogen into helium by nuclear fusion produces heat and light. Hydrogen is used to make rocket fuel, synthetic ammonia, and methanol, to hydrogenate fats and oils, and to refine petroleum. The development of physical theories of electron orbitals in hydrogen was important in the development of quantum mechanics. Atomic number 1; atomic weight 1.00794; melting point -259.14°C; boiling point -252.8°C; density at 0°C 0.08987 gram per liter; valence 1. See Periodic Table. See Note at oxygen.
h[from SF fandom] A method of `marking' common words, i.e., calling attention to the fact that they are being used in a nonstandard, ironic, or humorous way. Originated in the fannish catchphrase "Bheer is the One True Ghod!" from decades ago. H-infix marking of `Ghod' and other words spread into the 1960s counterculture via underground comix, and into early hackerdom either from the counterculture or from SF fandom (the three overlapped heavily at the time). More recently, the h infix has become an expected feature of benchmark names (Dhrystone, Rhealstone, etc.); this is probably patterning on the original Whetstone (the name of a laboratory) but influenced by the fannish/counterculture h infix.