Les gobelins dans le livre "Bilbo : le hobbit"

[aravanessë]

'There are Orcs, very many of them,' he said. `And some are large and evil: black Uruks of Mordor. For the moment they are hanging back, but there is something else there. A great cave-troll, I think, or more than one. There is no hope of escape that way.'

Ce sont des Orcs comme dit dans cette citation du SDA.

Orcs and the Black Speech.
Orc is the form of the name that other races had for this foul people as it was in the language of Rohan. In Sindarin it was orch. Related, no doubt, was the word uruk of the Black Speech, though this was applied as a rule only to the great soldier-orcs that at this time issued from Mordor and Isengard. The lesser kinds were called, especially by the Uruk-hai, snaga 'slave'.

Dans l'Appendice F il est dit qu' "uruk" est bien dérivé du sindarin yrch "orque" mais qu'il n'est appliqué qu'aux grands Orques de l'Isengard et du Mordor.

In the last years of Denethor I the race of uruks, black orcs of great strength, first appeared out of Mordor, and in 2475 they swept across Ithilien and took Osgiliath. Boromir son of Denethor (after whom Boromir of the Nine Walkers was later named) defeated them and regained Ithilien

Ils sont d'abord apparus au Mordor en 2475 du 3ème Age, ce qui n'empêche en rien qu'il y en ait un en Isengard plus d'un demi-millénaire plus tard!
aravanessë