Please have a seat; the doctor will be with you shortly. He’s come a long way etymologically, from the Latin docere, doctum, “to lead or teach.” Our first doctors were teachers — learned men who had mastered a particular field of study, an accomplishment we recognize today by awarding a doctorate (c.1378) as our highest academic honor.

Healthy Living comics by Larry Paros. In So Many Words. Book 3. Doctor This.
Healthy-Living-Comics-Larry-Paros