Words matter. Etymology gives us insight not only into the origins of words, but why they remain so important today, especially in medicine. In this episode, we’re delving into four specific words -- doctor, cerebrovascular accident, rounds, and zebras.  And along the way, we’re going to discuss pre-historical pastoralists on the Eurasian steppes, medieval universities, Octagonal air-ventilated chambers in 19th century Baltimore, and of course, early 21st century sitcoms.