sciatic/saɪˈætɪk/EtymologyBorrowed from Middle French sciatique, from Late Latin sciaticus, variant of ischiadicus, from Ancient Greek ἰσχιαδικός (iskhiadikós), the adjective of ἰσχίον (iskhíon, “hip”).adjOf, or relating to the ischium.Of, or relating to sciatica.nounThe sciatic nerve.A person with sciatica.