In Greek mythology, an Oread (; Ancient Greek: Ὀρειάς, romanized: Oreiás, stem Ὀρειάδ-, Oreiád-, Latin: Oreas/Oread-, from ὄρος, "mountain") or Orestiad ; Ὀρεστιάδες, Orestiádes) is a mountain nymph. They differ from each other according to their dwelling: the Idaeae were from Mount Ida, Peliades from Mount Pelion, etc. They were associated with Artemis, since the goddess, when she went out hunting, preferred mountains and rocky precipices. The term itself appears to be Hellenistic, first attested in Bion of Smyrna's Ἐπιτάφιος Ἀδώνιδος and thus post-Classical.