„Steamship (or steamer)“

Vessels powered by steam engines. However, the term is often used to describe powered vessels in general, and companies who operate ocean going cargo vessels are often called “steamship companies” despite the fact that the use of steam power for ocean going vessels is obsolete, the modern standard being diesel engines fueled by oil.

“Marine Diesel Engines: Maintenance, Troubleshooting, and Repair” by Nigel Calder, International Marine/Ragged Mountain Press, 2007.