DH, Dh, dh, or dH may refer to:

Places

* DH postcode area, in the United Kingdom for the area of Durham and surrounding towns *

Diamond Head, Hawaii Diamond Head is a volcanic tuff cone on the Hawaiian island of Oahu and known to Hawaiians as Lēahi (). The Hawaiian name is most likely derived from ''lae'' (browridge, promontory) plus ''ahi'' (tuna) because the shape of the ridgeline resem ...

, a volcanic tuff cone on Oʻahu

Organisations

* D+H, a Canadian financial services company * Department of Health (United Kingdom), a department of the UK government *

DH Press Dark Horse Comics is an American comic book, graphic novel, and manga publisher founded in Milwaukie, Oregon by Mike Richardson in 1986. The company was created using funds earned from Richardson's chain of Portland, Oregon comic book shops known ...

, the Dark Horse Comics imprint that publishes novels *

Deccan Herald ''Deccan Herald'' is an Indian English language daily newspaper published from the Indian state of Karnataka. It was founded by K. N. Guruswamy, a liquor businessman from Ballari and was launched on 17 June 1948. It is published by The Printe ...

, an Indian newspaper

Science and technology

* Denavit–Hartenberg parameters, a type of robotics convention * Dermatitis herpetiformis, a skin disease * DH register, the high byte of a DX register in x86-compatible microprocessors * Diffie-Hellman key exchange (D-H), a specific method of securely exchanging cryptographic keys over a public channel *

District heating District heating (also known as heat networks or teleheating) is a system for distributing heat generated in a centralized location through a system of insulated pipes for residential and commercial heating requirements such as space heating a ...

, a method of heating multiple buildings from a central location *

Doubled haploidy A doubled haploid (DH) is a genotype formed when haploid cells undergo chromosome doubling. Artificial production of doubled haploids is important in plant breeding. Haploid cells are produced from pollen or egg cells or from other cells of the gam ...

, a genetic status * Deuterium:protium (D:H), a ratio in

deuterium-depleted water Deuterium-depleted water (DDW) is water which has a lower concentration of deuterium than occurs naturally at sea level on Earth. DDW is sometimes known as light water, although " light water" has long referred to ordinary water, specifically in ...

*°dH, deutsche Härte, a unit of

water hardness Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, which are largely made up of calcium and magnesium carbonates, bicarbo ...

* Dorsal horn of the spinal cord, or

posterior grey column The posterior grey column (posterior cornu, dorsal horn, spinal dorsal horn, posterior horn, sensory horn) of the spinal cord is one of the three grey columns of the spinal cord. It receives several types of sensory information from the body, incl ...

Sports

Designated hitter The designated hitter (DH) is a baseball player who bats in place of another position player, most commonly the pitcher. The position is authorized by Major League Baseball Rule 5.11. It was adopted by the American League in 1973 and later by th ...

, a baseball rule *

Doubleheader (baseball) In the sport of baseball, a doubleheader is a set of two games played between the same two teams on the same day. Historically, doubleheaders have been played in immediate succession, in front of the same crowd. Contemporarily, the term is also u ...

Doubleheader (television) A doubleheader is a term used by television networks to refer to two games involving the same sport that are shown back-to-back on the same network, even though the events do not involve the same two teams (three such games may be referred to as a ...

* Downhill (ski competition), a skiing discipline *

Downhill mountain biking Downhill mountain biking (DH) is a style of mountain biking practiced on steep, rough terrain that often features jumps, drops, rock gardens and other obstacles. Jumps can be up to and including , and drops can be greater than . The rider c ...

, a bicycling discipline

Transportation

de Havilland The de Havilland Aircraft Company Limited () was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of north London. Operations were later moved to Hatfield in H ...

, a former UK aircraft manufacturer *

Decision height In aviation, an instrument approach or instrument approach procedure (IAP) is a series of predetermined maneuvers for the orderly transfer of an aircraft operating under instrument flight rules from the beginning of the initial approach to a landi ...

, in aviation *

Delaware and Hudson Railway The Delaware and Hudson Railway (D&H) is a railroad that operates in the Northeastern United States. In 1991, after more than 150 years as an independent railroad, the D&H was purchased by the Canadian Pacific Railway (CP). CP operates D&H ...

* Independence Air (IATA code)

Other uses

Dh (digraph) This is a list of digraphs used in various Latin alphabets. Capitalisation involves only the first letter (''ch'' becomes ''Ch'') unless otherwise stated (''ij'' becomes ''IJ''). Letters with diacritics are arranged in alphabetic order accordin ...

, in linguistics * Dear husband, a shorthand phrase common in online forums * Donor husband * Digital humanities, a community of practice combining technology with humanistic inquiry *

Documentary hypothesis The documentary hypothesis (DH) is one of the models used by biblical scholars to explain the origins and composition of the Torah (or Pentateuch, the first five books of the Bible: Genesis, Exodus, Leviticus, Numbers, and Deuteronomy). A vers ...

or Wellhausen hypothesis, describing the origins of Judeo-Christian scripture * Domestic Helper * Informal abbreviation for ''