Oros of Alexander (Ancient Greek: Ὦρος ὁ Ἀλεξανδρεύς, also called Orus) was a late classical/Byzantine lexicographer and grammarian active in the mid-5th century.
The Suda lists ten titles by him, but little of his work survives.
[1] Fragments of his lexicon of Attic usages are preserved in later lexica.
Oros' work was influential in the later Byzantine lexicographical tradition.
The codex Messinensis graecus 118 contains a fragment of a work on orthography concerning the use of the iota subscript.