Is there a word specifically referring to the stand upon which a large book is displayed, opened to a page?

Solution 1:

A lectern is a reading desk, with a slanted top, usually placed on a stand or affixed to some other form of support, on which documents or books are placed as support for reading aloud.

Solution 2:

It is just a display book stand. You might need a lectern or Shtender (for DavidM) if the main purpose was someone reading at the "stand".

Also if it is for a Bible and you want something grand then you may want an ambo or pulpit.

Solution 3:

"Book stand" is the natural choice.

A tall book stand such as you describe is a "freestanding book stand". Woodform, Inc. uses this term, and they seem to know what they're talking about! They also refer to a "dictionary stand".

Otherwise, a "podium" is

a stand with a slanted surface that holds a book, notes, etc., for someone who is reading, speaking, or teaching

Or, if you want get poetic, there is "pedestal" or "plinth".

Solution 4:

Various terms are used:

Book cradle of book exhibition cradle (source, source) are used for museum displays.

A tradename for a purportedly superior book cradle is the Benchmark Butterfly Bookmount. (source)

A search of book cradle shows that book stand (mentioned by nxx) is also used, apparently for less demanding displays.