1. H

noun. the 8th letter of the Roman alphabet.

Rhymes with H

• h.

How do you pronounce h?

Pronounce h as eɪʧ.

US - How to pronounce h in American English

UK - How to pronounce h in British English

2. H-shaped

adjective. shaped in the form of the letter H.

3. H-bomb

noun. a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium.

4. km/h

noun. the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours).

5. H._pylori

noun. the type species of genus Heliobacter; produces urease and is associated with several gastroduodenal diseases (including gastritis and gastric ulcers and duodenal ulcers and other peptic ulcers).

6. H

noun. 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.

7. H

noun. 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.

8. H

noun. (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure.

9. h

noun. ['ˈeɪtʃ'] the 8th letter of the Roman alphabet.

10. h

noun. ['ˈeɪtʃ'] the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second.