Sharaf al-ZamÃÂn ṬÃÂhir al-Marwazë or Marvazë (; fl. 1056/57âÂÂ1124/25 CE) was a physician and author of Nature of Animals ( ').
He was a native of Merv, part of the Khorasan region in modern-day Turkmenistan.
Al-Marwazë drew upon the works of Aristotle, Dioscorides, Galen, Oribasius, Timotheos of Gaza, Paul of Aegina, and the Muslim scholar Al-Jahiz. The work comprises five parts:
Al-Marwazi served as physician at the courts of the Seljuk Sultan Malik-Shah I and his successors. As a physician, he recorded observations of parasitic worms.