Seid

Seid or SEID may refer to:

Medicine

 * Systemic exertion intolerance disease (SEID), alternative name for myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)

People

 * Alamin Mohammed Seid, Eritrean politician
 * Alan R. Seid (born 1957), Palauan businessman and politician
 * Joseph Brahim Seid (1927–1970), Chadian writer and Minister of Justice
 * Ruth Seid (1913–1995), American novelist under the pen name Jo Sinclair
 * Sattar Seid (born 1987), Iranian cross-country skier
 * Seïd Khiter (born 1985), French footballer
 * Seid Memić (born 1950), Bosnian singer

Fictional characters

 * Pasha Seid, in Verdi's opera Il corsaro
 * Seid, in Mahomet (play)

Other uses

 * Seid or Seiðr, a type of Old Norse sorcery or witchcraft
 * USS Seid (DE-256), a United States Navy destroyer escort of World War II
 * Secure element ID (SEID), an aspect of near field communication