Why do we call moving an aircraft on the ground "taxi"? We all know what "taxi" means to general public -- a car which carries you from A to B in exchange for your paying a fare.

"Taxi" also means to drive an aircraft on the ground. Why do we call it that? What's the reason &amp; history behind the term?
This online etymological site suggests that an airplane moves slowly across the field in a similar fashion to how a taxi-cab driver would slowly make his way down a block looking for fares, and the term is borrowed from that behavior.