Oromëan was the Elvish linguistic phylum in an early conception of Middle-earth as seen in the Lhammas. In this conception, Oromëan and the languages of the Elves was contrasted with Aulëan, the phylum of the Dwarves. These languages such as Quenya and Sindarin are said to be derived from the speech of Oromë, the Valar and huntsman who first encountered the Elves after the Awakening at Cuiviénen.
This concept was later dropped by J.R.R. Tolkien, being replaced with the Primitive Quendian tongues.