/ Dictionary / Index S sciatica: Meaning and Definition of Find definitions for: sci•at•i•ca Pronunciation: (sī-at'i-ku), [key] — n. Pathol. pain and tenderness at some points of the sciatic nerve, usually caused by a prolapsed intervertebral disk; sciatic neuralgia. any painful disorder extending from the hip down the back of the thigh and surrounding area. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sciatica (Thesaurus) sciatic sciatic nerve Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language