Here are some excerpts from my book collection which you may find interesting! I was hoping I'd be able to find a definitive answer... It would seem that a cylinder is more a Solid of Revolution than a prism, geometrically.
"Practical Plane and Solid Geometry", Harrison and Baxandall, 1895
"A Practical Course of Mathematics", A H Bell, 1946
This book groups Prisms and a Cylinder together - I think this is the root of the problem!
"Geometry of Construction", T B Nichols and Norman Keep, 1953
Best. Author Name. Ever.
"Oxford Mathematics Study Dictionary", Frank Tapson, 1999
"A Thousand Faces of Geometry", Claudi Alsina, 2013
I like the sound of "Antiprisms"
Side note... Are THESE prisms?