Nicander in the context of "Leucophrys"

The Vienna Dioscurides or Vienna Dioscorides is an early 6th-century Byzantine Greek illuminated manuscript of an even earlier 1st century AD work, De materia medica (Ancient Greek: Περὶ ὕλης ἰατρικῆς, romanized: Perì hylēs iatrikēs) by Pedanius Dioscorides in uncial script. It is an important and rare example of a late antique scientific text. After residing in Constantinople for just over a thousand years, the text passed to the Holy Roman Emperor in Vienna in the 16th century, a century after the city fell to the Ottoman Empire.

The 491 vellum folios measure 37 cm (15 in) by 30 cm (12 in) and contain more than 400 pictures of animals and plants, most done in a naturalistic style. In addition to the text by Dioscorides, the manuscript has appended to it, the Carmen de herbis attributed to Rufus, a paraphrase of an ornithological treatise by a certain Dionysius, usually identified with Dionysius of Philadelphia, and a paraphrase of Nicander's treatise on the treatment of snake bites.

In Greek mythology, Thoas (Ancient Greek: Θόας, lit. 'fleet, swift') was a king of the Taurians, a barbaric tribe in Crimea. He was king when Agamemnon's daughter Iphigenia was taken to the land of the Taurians, and became a priestess of Artemis there. He was a character in Euripides' play Iphigenia among the Taurians. He is sometimes identified with the Thoas who was the king of Lemnos and the son of Dionysus and Ariadne, and the father of Hypsipyle.

According to the Greek grammarian Antoninus Liberalis, the 2nd-century BC poet Nicander said that Thoas was the son of Borysthenes, god of a major river to the far north of Greece (now the Dnieper).