TH

Th or TH may refer to:

Language

 * Eth (ð), a letter used in Old English, Icelandic, Faroese and Elfdalian
 * Th (digraph), a digraph in the Roman alphabet
 * Pronunciation of English th aspects of this digraph in English
 * Voiced dental fricative, a type of consonantal sound in some languages
 * Voiceless dental fricative, a type of consonantal sound in some languages
 * Thai language (ISO 639 code), the national and official language of Thailand
 * Thorn (letter) (þ), a letter in Old Norse, Old English, Icelandic and related languages
 * "-th," the most common ordinal number suffix in English (in some style guides rendered th)

Places

 * Thuringia, a state of Germany
 * Territory of Hawaii, formerly the Republic of Hawaii and prior to that the Kingdom of Hawaii
 * Terre Haute, Indiana

Biology and medicine

 * T helper cell Th, in the immune system
 * Terminologia Histologica, an international standard for nomenclature in cytology and histology
 * Thyroid hormones, in the endocrine system
 * Tyrosine hydroxylase, an enzyme

Units of measurement

 * Thomson (unit) (Th) in mass spectrometry
 * Thermie (th), metric unit of heat energy equal to 1,000 kilocalories

Other uses in science and technology

 * .th, the Internet country code top-level domain for Thailand
 * Thorium, symbol Th, a chemical element
 * Tianhe (space station module)
 * ..., HTML element for table header cell
 * Hold time (th) of a flip flop in electronics

Groups, organizations, companies

 * Tommy Hilfiger, an apparel brand
 * Taiwan Historica, an academic institution in Nantou County, Taiwan
 * Technische Hochschule, a Technical University in German-speaking countries
 * Technische hogeschool, a Technical University in Dutch-speaking countries
 * Telegraph Herald, a newspaper in Dubuque, Iowa, USA, nickname
 * Thai Airways Company (former IATA airline designator TH)
 * Raya Airways, Malaysia (IATA airline designator TH)

Other uses

 * Thursday, abbreviated Th
 * Th (album), a 1997 album by the Glenn Spearman–John Heward Group