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 politician 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
See also
Sead (disambiguation) Seed (disambiguation)