TN

TN may refer to:

Organizations

*Air Tahiti Nui, a French Polynesian airline with the IATA airline designation "TN"
*Texas and Northern Railway, an American Railway with the AAR reporting mark "TN"

Places

*Tamil Nadu, a state in southern India, whose ISO abbreviation is "IN-TN"
*Tennessee, a state in the United States, whose postal abbreviation is "TN"
*Tonbridge, a region in England with the postcode "TN"
*Tunisia, a country in Africa, whose ISO country code is "TN"
*The province of Trento, a province in Italy, whose ISO abbreviation is "IT-TN"

cientific terms

*Neel Temperature, the temperature at which an antiferromagnetic material becomes paramagnetic (represented as T_N)
*Trigeminal neuralgia, a neuropathic disorder
*Transposon (when immediately followed by a number), a DNA sequence that can change positions
*Twisted Nematic, an LCD panel technology