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 ?
Someone has been drumming into people, over the years, that it is common to drop their aitches so they add an aitch to aitch making it haitch.
Next Saturday, Sea Haitch Em, a winner of three of his four starts last season, owned and trained by Vivian Hughes and Lisa Llewellyn and qualified with the Llangeinor Hunt, runs at Haydock Park in a hunter 'chase.
It makes them beep when the driver in front makes a meal of a simple left-hand turn or grumble when people who think they are being proper say haitch instead of aitch - as in Haitch TV - which is incorrect.