Meaning: [eɪtʃ] 
n. 1. 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 2. 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 3. the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second 4. the 8th letter of the Roman alphabet 5. (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure.
n. 1. 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 2. 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 3. the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second 4. the 8th letter of the Roman alphabet 5. (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure. 
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1, Whenever you hear a man speak of his love for his country, it is a sign that he expects to be paid for it. ——H. L.
2, In Britain speed is restricted to 30 m.p.h. in towns.
3, The chemical formula for water is H 2 O.
4, travelling at a constant speed of 50 m.p.h.
5, H is political commitment is only skin-deep.
6, By the third lap Kinkead had touched 289 m.p.h.
7, 'Hat' begins with H / 'H'.
8, The book is written by P.H. Reaney, a noted specialist in the field.
9, Why don't you ask Roy? H e's well up in Chinese art.
10, She has written a memoir of her encounters with W.H. Auden over the years.
11, In some words in English the initial h is not sounded,as honour,hour,honesty,etc.
12, D H Lawrence immortalised her in his novel 'Women in Love'.
13, Police pulled him over doing 120km/h, making rapid changes and tailgating.
14, The use of H - bombs would be an outrage against humanity.
15, Wind gusts at 80 m.p.h. were clocked at Rapid City.
16, H grants Caltrans the authority to act.
17, Henry Schmitt's cattle are branded with H lazy S.
18, H.,[http://sentencedict.com/h.html] was charged with murder and kidnapping Tuesday morning.
19, Abbreviations for restriction enzyme sites: H, Hin dIII.
20, And she bugs you about H. G. Wells.
21, That idiocy about H. G. Wells.
22, W H Smith acquired it in 1903 and carried out a major expansion and refit in 1907.
23, But it was the Chickasaw, commanded by George H.. Perkins, that fired the most destructive shots.
24, A storm blasted the Florida coast with 75 m.p.h. winds.
25, Future studies evaluating mechanisms of gastrin release have to take into account the H pylori state.
26, Why did you walk away from me like that? H ave I said words to offend you?
27, Fear not that the lift shall come to an end ,[sentencedict.com]but rather fear that it shall never have a beginning.——J.H.
28, Book of the Week: Dog Breeds by A J Barker and H A Barker.
29, The W.H.O. safety standard for ozone levels is somewhere about a hundred.
30, H M Customs and Excise confirmed yesterday that they had to be implemented by 1 January 1990.