h

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H,

8th letter of the alphabetalphabet
[Gr. alpha-beta, like Eng. ABC], system of writing, theoretically having a one-for-one relation between character (or letter) and phoneme (see phonetics). Few alphabets have achieved the ideal exactness.
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. It is a usual symbol for a glottal spirant, murmured (as in the English house) or voiceless (as in the English herb). In some Greek alphabets eta, the long e, had this form. In chemistry H is the symbol for the element hydrogenhydrogen
[Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; interval in which at. wt. ranges 1.00784–1.00811; m.p. −259.14°C;; b.p. −252.87°C;; density 0.08988 grams per liter at STP; valence usually +1.
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.

h

(quantum mechanics)

H

(electromagnetism)
(chemistry)

H

On drawings, abbr. for “hard.”

h

Symbol for “hour.”

h

(1)
A simple markup language intended for quick conversion of existing text to hypertext.

h

(2)
A method of marking common words to call 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 follows on from the original Whetstone (the name of a laboratory) but may have been influenced by the fannish/counterculture h infix.

h

(Hexadecimal) A symbol that refers to a hex number. For example, 09h has a numeric value of 9, whereas 0Ah has a value of 10. See hex chart. See also henry.
References in periodicals archive ?
When you think of the horses they have trained in the past, like Opera Fan, Sea Haitch Em and Primaticcio, who all went on to win good races, it shouldn't have come as that much of a surprise for they have a knack of getting their horses fit and well.
Less scientific methods include measuring the distance between a person's eyes, whether they say aitch or haitch, or observing which foot they kick with.
I would definitely have to complain to the Faultless Friends web site if they sent me anyone who incorrectly aspirated in the belief it was posh (saying Haitch TV Wales, instead of the correct Aitch TV Wales).