H

	1.	the eighth letter of the English alphabet, is classed among the consonants, and is formed with the mouth organs in the same position as that of the succeeding vowel. It is used with certain consonants to form digraphs representing sounds which are not found in the alphabet, as sh, th, th, as in shall, thing, thine (for zh see 274); also, to modify the sounds of some other letters, as when placed after c and p, with the former of which it represents a compound sound like that of tsh, as in charm (written also tch as in catch), with the latter, the sound of f, as in phase, phantom. In some words, mostly derived or introduced from foreign languages, h following c and g indicates that those consonants have the hard sound before e, i, and y, as in chemistry, chiromancy, chyle, Ghent, Ghibelline, etc.; in some others, ch has the sound of sh, as in chicane. See Guide to Pronunciation, 153, 179, 181-3, 237-8. H piece (Mining) the part of a plunger pump which contains the valve.
	1.	(Mus.) The seventh degree in the diatonic scale, being used by the Germans for B natural. See B.

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Noun	1.	H - 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: atomic number 1, hydrogen
	2.	H - 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: henry
	3.	h - the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10\-34 joule-second Synonyms: Planck's constant
	4.	H - the 8th letter of the Roman alphabet
	5.	H - (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure; "enthalpy is the amount of energy in a system capable of doing mechanical work" Synonyms: enthalpy, heat content, total heat

1.		h - A simple markup language intended for quick conversion of existing text to hypertext.
2.		h - 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.

atomic number 1, chemical element, element, gas, H2O, hydrogen, tritium, water

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