Webster’s Revised Unabridged Dictionary · 1913
Ischiadic
Is′chi·ad′ic (ĭs′kĭ·ăd′ĭk), a. [L. ischiadicus, Gr. ἰσχιαδοκός, fr. ἰσχίον the hip joint, hip or loin. Cf. Sciatic.] (Anat.) Ischial. [R.]
Ischiadic passion or disease (Med.), a rheumatic or neuralgic affection of some part about the hip joint; — called also sciatica.