H3
H3, H03 or H-3 may refer to:
Culture
- Happy Hustle High, a manga series by Rie Takada
- Halo 3, a video game by Bungie Studios for the Xbox 360
- H3 (film), a 2001 film about the 1981 Irish hunger strike
Science
- H3 Triatomic hydrogen
- Hydrogen-3, H-3, 3H (a.k.a. Tritium), an unstable isotope of hydrogen
- The trihydrogen cation, H3+, one of the simplest polyatomic molecules
- ATC code H03 Thyroid therapy, a subgroup of the Anatomical Therapeutic Chemical Classification System
- British NVC community H3, a heath community of the British National Vegetation Classification system
- Histamine H3 receptor, a human gene
- Histone H3, a component of DNA higher structure in eukaryotic cells
- Disorders of eyelid in diseases classified elsewhere ICD-10 code
- h3 is the HTML tag for a level 3 heading
- H3 cell phone charger, by Swedish company myFC, using water fuel cell
- *h₃, one of the three laryngeals in the reconstructed Proto-Indo-European language
Transportation
- H-3 Sea King, a United States Navy helicopter
- PRR H3, an American PRR 2-8-0 steam locomotive
- Standard H-3, an improved version of the 1916 Standard H-2 aircraft
- USS H-3 (SS-30), a 1914 United States Navy H-class submarine
- H3 Monks Way, a road part of the Milton Keynes grid road system
- HMS Grenville (H03), a 1935 British Royal Navy destroyer
- HMS H3, a 1915 British Royal Navy H class submarine
- Hummer H3, the smallest of the three Hummer models sold by General Motors
- Interstate H-3, a highway in Hawaii
- H-3 air base cluster located 435 kilometers from Bagdad in western Iraq. The main H3 airfield was originally built to support the H-3 oil pumping station.
- Highway H03 (Ukraine), a road in Ukraine
Other uses