1) Boat 2) River transport of yore 3) Robert E Lee 4) Ship type 5) Springs on the Yampa 6) The Robert E Lee 1) Showboat 
A steamboat is a boat in which the primary method of propulsion is steam power, typically driving propellers or paddlewheels. Steamboats sometimes use the prefix designation SS, S.S. or S/S (for `Screw Steamer`) or PS (for `Paddle Steamer`), however these designations are most often used for Steamships. The term steamboat is used to refer to s...
• (n.) A boat or vessel propelled by steam power; -- generally used of river or coasting craft, as distinguished from ocean steamers.
any watercraft propelled by steam, but more narrowly, a shallow-draft paddle wheel steamboat widely used on rivers in the 19th century, and ... [8 related articles]
Steam'boat` noun A boat or vessel propelled by steam power; -- generally used of river or coasting craft, as distinguished from ocean steamers. 
[n] - a boat propelled by a steam engine
noun a boat propelled by a steam engine
a steam-driven vessel, esp. a small one or one used on inland waters.