What really is a 'Jumbo'?

From:         Marc Richard Wollemborg <mrw13@columbia.edu>
Organization: Columbia University
Date:         09 Apr 95 22:37:12 
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I've always held the opinion that only 747s are Jumbos; but I have read 
several articles in which other wide-body passenger jets (such as the 
A300, 767, etc.) are referred to as "jumbo jets".  Anyone have any 
insightful comments on this?
					-Marc Wollemborg