Is it ensure, insure, or assure?
1640s, from French médical, from Late Latin medicalis "of a physician," from Latin medicus "physician, surgeon, medical man" (n.); "healing, madicinal" (adj.), from mederi "to heal, give medical attention to, cure," originally "know the best course for," from an early specialization of the PIE root *med- "to measure, limit, consider, advise, take appropriate measures" (cf. Greek medomai "be mindful of," medein "to rule;" Avestan vi-mad- "physician;" Latin meditari "think or reflect on, consider;" Irish miduir "judge;" Old English metan "to measure out"); also see meditation. The earlier adjective in English in this sense was medicinal. Related: Medically.
1917, short for medical examination.
medical med·i·cal (měd'ĭ-kəl)
Of, relating to, or characterizing the study or practice of medicine.
Requiring treatment by medicine.